Martian Calendar Based on Formula by RobertDyck

Post by **tahanson43206** » Mon Oct 12, 2026 5:00 pm

===
Today on Mars: 0039/01/12 Thursday Days of the week OFFSET 4 with Earth. (count from Mars to Earth )
Sol 011 Business Month 01 First month of Quarter 1 of Year 39
Today on Earth: 2026/10/12 Monday
>16

To see how this calendar works, we show the standard 28 day month at the bottom of this daily report.
There are 20 months of 28 Sols and 4 months of 27 Sols at the end of the four six-month quarters.
New Years Eve is extended to align the Business Calendar for Mars with the Astronomical calendar.
Business and Astronomical both start at zero (to the nanosecond) on New Year's Day.
This calendar has been in operation for two full Mars years (36 and 37). We are in Year 38

This calendar is NOT the Darian Calendar!

Per http://www-mars.lmd.jussieu.fr/mars/tim ... _time.html also see: in-the-sky.org for opposition/perigee/aphelion

Martian Year: 39 Martian Astronomical Interval in 12 interval format: 1 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 30 degrees

===
Solar Longitude: 005.6 Sol Number: 012 Change in degrees is +.5 Julian date is: J0039012
Solar Longitude: 005.1 Sol Number: 011 Change in degrees is +.5 Julian date is: J0039011
Solar Longitude: 004.6 Sol Number: 010 Change in degrees is +.5 Julian date is: J0039010
#7>

Note that Solar Longitude measurement varies as a function of location in orbit. Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other. Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars date as J00##### (and set Search term)
Perihelion occurred in 2026 at Ls 251 on Sol 486 - Earth Date 2026/03/27 Next: (estimated) 2028/05/15
Perihelion occurred in 2024 at Ls 251 on Sol 485 - Earth Date 2024/05/08 Next: (estimated) 2026/03/06 (actual) 2026/03/26
Perihelion occurred in 2022 at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion Earth Dates: Next: 2027/03/04 Earlier: 2025/04/16, 2023/05/30, 2021/07/12, 2019/08/25, 2017/10/07, 2015/11/20
Aphelion occurred at--- Ls 071 on Sol 152.
Aphelion occurred near Ls 070 on Sol 153 (per http://www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations. The calculations use tenths of hours. The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun. Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

Aphelion of Mars is due March 04, 2027 Sol 151-152 Note velocity of Mars was 22.0 km/s nearing Aphelion (21.97 km/s)
Perhelion of Mars is due May, 2028 Sol 251 Note velocity of Mars was 26.5 km/s nearing Perihelion 2026/03/26
Mars passed through 0 Radial Distance on outbound leg Sol 633 of Year 38 2026/08/25 Solar Longitude is 341.1 (90 degrees season)
Mars will pass through 0 Radial Distance on inbound leg Sol 219 at longitude 71 270 degrees seasonal)
Conversion between seasons and physical frameworks: L_s = theta + 251 theta = L_s - 251

===
Distance: Mars >> Sun per theskylive.com: 235,195,647 km [23.4 km/s] Difference is +177792 <= +7408 km/hour at 12.0 on 10/12 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 235,017,855 km [23.4 km/s] Difference is +178505 <= +7438 km/hour at 12.0 on 10/11 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 234,839,350 km [23.4 km/s] Difference is +179153 <= +7465 km/hour at 12.0 on 10/10 (time 12:00) (24.0 hours)
>13

Velocity along the orbit is NOT the same thing as velocity change of the radial distance to the Sun. Both are shown in the section above.
Observation: The sky view is ** filled ** with objects and some have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth. The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth. Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

===
Mars may be seen in a simulated telescope view at https://theskylive.com/mars-tracker
14>

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18,2:36,3:54,4:72,5:90,6:108,7:126,8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324, 19:342,20:360,21:378,22:396

Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ minutes round trip.

=== Time estimate will change below 234 megaKm
Earth Distance in km: 2026/10/12 236,913,397 (decreasing)
Earth Distance in km: 2026/10/11 238,012,337 (decreasing)
Earth Distance in km: 2026/10/10 239,104,924 (decreasing)
>15

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in Year 36. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth. Communications delays in that circumstance will increase due to the extra distance to be covered. Mr. Musk indicated he expects such communication will be handled by laser. Location would be optimum at poles of solar plane.

This web site offers an online model of the solar system: www.solarsystemscope.com
This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===
Sol 012 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<< 37 is skip day on Mars
Month 01 extends from Sol 1 through 28. <<== There are 28 Sols in Month 01. See post 82 of Holidays topic for current details
Direct path to source: http://newmars.com/forums/viewtopic.php ... 57#p154257
Sol 012 is Thursday in the Proposed Business calendar for Mars. Sol 667 Skip Day on Mars. Next is near 24 or 37 of Year 39
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Year 38 started November 12, 2024 on Earth
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

Days of the Week Alignment:
Days of the week fall behind Earth due to the longer Sol, but they also change when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036* or J0037*
The most recent End-Of-Quarter change occurred: … The search specified above gave 11 pages of results.

For current weather on Mars see:

***https://mars.nasa.gov/insight/weather/***
***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ ... ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar Copyright ® 2023 NewMars.com Mars Society
Su Mo Tu We Th Fr Sa
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28

Recruiting text may be found at the bottom of this post: http://newmars.com/forums/viewtopic.php ... 57#p154257
Copyright the Mars Society All Rights Reserved

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 39

Post by **tahanson43206** » Sun Oct 11, 2026 3:08 pm

===
Today on Mars: 0039/01/11 Wednesday Days of the week OFFSET 4 with Earth. (count from Mars to Earth )
Sol 011 Business Month 01 First month of Quarter 1 of Year 39
Today on Earth: 2026/10/11 Sunday
>16

To see how this calendar works, we show the standard 28 day month at the bottom of this daily report.
There are 20 months of 28 Sols and 4 months of 27 Sols at the end of the four six-month quarters.
New Years Eve is extended to align the Business Calendar for Mars with the Astronomical calendar.
Business and Astronomical both start at zero (to the nanosecond) on New Year's Day.
This calendar has been in operation for two full Mars years (36 and 37). We are in Year 38

This calendar is NOT the Darian Calendar!

Per http://www-mars.lmd.jussieu.fr/mars/tim ... _time.html also see: in-the-sky.org for opposition/perigee/aphelion

Martian Year: 39 Martian Astronomical Interval in 12 interval format: 1 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 30 degrees

===
Solar Longitude: 005.1 Sol Number: 011 Change in degrees is +.5 Julian date is: J0039011
Solar Longitude: 004.6 Sol Number: 010 Change in degrees is +.5 Julian date is: J0039010
Solar Longitude: 004.1 Sol Number: 009 Change in degrees is +.4 Julian date is: J0039009
#7>

Note that Solar Longitude measurement varies as a function of location in orbit. Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other. Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars date as J00##### (and set Search term)
Perihelion occurred in 2026 at Ls 251 on Sol 486 - Earth Date 2026/03/27 Next: (estimated) 2028/05/15
Perihelion occurred in 2024 at Ls 251 on Sol 485 - Earth Date 2024/05/08 Next: (estimated) 2026/03/06 (actual) 2026/03/26
Perihelion occurred in 2022 at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion Earth Dates: Next: 2027/03/04 Earlier: 2025/04/16, 2023/05/30, 2021/07/12, 2019/08/25, 2017/10/07, 2015/11/20
Aphelion occurred at--- Ls 071 on Sol 152.
Aphelion occurred near Ls 070 on Sol 153 (per http://www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations. The calculations use tenths of hours. The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun. Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

Aphelion of Mars is due March 04, 2027 Sol 151-152 Note velocity of Mars was 22.0 km/s nearing Aphelion (21.97 km/s)
Perhelion of Mars is due May, 2028 Sol 251 Note velocity of Mars was 26.5 km/s nearing Perihelion 2026/03/26
Mars passed through 0 Radial Distance on outbound leg Sol 633 of Year 38 2026/08/25 Solar Longitude is 341.1 (90 degrees season)
Mars will pass through 0 Radial Distance on inbound leg Sol 219 at longitude 71 270 degrees seasonal)
Conversion between seasons and physical frameworks: L_s = theta + 251 theta = L_s - 251

===
Distance: Mars >> Sun per theskylive.com: 235,017,855 km [23.4 km/s] Difference is +178505 <= +7438 km/hour at 12.0 on 10/11 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 234,839,350 km [23.4 km/s] Difference is +179153 <= +7465 km/hour at 12.0 on 10/10 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 234,660,197 km [23.4 km/s] Difference is +179855 <= +7494 km/hour at 12.0 on 10/09 (time 12:00) (24.0 hours)
>13

Velocity along the orbit is NOT the same thing as velocity change of the radial distance to the Sun. Both are shown in the section above.
Observation: The sky view is ** filled ** with objects and some have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth. The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth. Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

=== Mars is in Regular movement as seen from Earth.
Mars is in cancer – we in NewMars have an opportunity to visit some of the stars in Cancer during this period
Next ahead: Star below path TYC 1395-1721-1 RA 8h 42m 6.5s
3 bright stars across path HIP 42578 RA 8h 40m 43.2s Day 2 above and ahead of Mars
14>

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18,2:36,3:54,4:72,5:90,6:108,7:126,8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324, 19:342,20:360,21:378,22:396

Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ minutes round trip.

=== Time estimate will change below 234 megaKm
Earth Distance in km: 2026/10/11 238,012,337 (decreasing)
Earth Distance in km: 2026/10/10 239,104,924 (decreasing)
Earth Distance in km: 2026/10/09 240,190,756 (decreasing)
>15

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in Year 36. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth. Communications delays in that circumstance will increase due to the extra distance to be covered. Mr. Musk indicated he expects such communication will be handled by laser. Location would be optimum at poles of solar plane.

This web site offers an online model of the solar system: www.solarsystemscope.com
This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===
Sol 011 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<< 37 is skip day on Mars
Month 01 extends from Sol 1 through 28. <<== There are 28 Sols in Month 01. See post 82 of Holidays topic for current details
Direct path to source: http://newmars.com/forums/viewtopic.php ... 57#p154257
Sol 011 is Wednesday in the Proposed Business calendar for Mars. Sol 667 Skip Day on Mars. Next is near 24 or 37 of Year 39
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Year 38 started November 12, 2024 on Earth
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

Days of the Week Alignment:
Days of the week fall behind Earth due to the longer Sol, but they also change when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036* or J0037*
The most recent End-Of-Quarter change occurred: … The search specified above gave 11 pages of results.

For current weather on Mars see:

***https://mars.nasa.gov/insight/weather/***
***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ ... ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar Copyright ® 2023 NewMars.com Mars Society
Su Mo Tu We Th Fr Sa
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28

Recruiting text may be found at the bottom of this post: http://newmars.com/forums/viewtopic.php ... 57#p154257
Copyright the Mars Society All Rights Reserved

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 39

Post by **tahanson43206** » Sat Oct 10, 2026 3:54 pm

===
Today on Mars: 0039/01/10 Tuesday Days of the week OFFSET 4 with Earth. (count from Mars to Earth )
Sol 010 Business Month 01 First month of Quarter 1 of Year 39
Today on Earth: 2026/10/10 Saturday
>16

To see how this calendar works, we show the standard 28 day month at the bottom of this daily report.
There are 20 months of 28 Sols and 4 months of 27 Sols at the end of the four six-month quarters.
New Years Eve is extended to align the Business Calendar for Mars with the Astronomical calendar.
Business and Astronomical both start at zero (to the nanosecond) on New Year's Day.
This calendar has been in operation for two full Mars years (36 and 37). We are in Year 38

This calendar is NOT the Darian Calendar!

Per http://www-mars.lmd.jussieu.fr/mars/tim ... _time.html also see: in-the-sky.org for opposition/perigee/aphelion

Martian Year: 39 Martian Astronomical Interval in 12 interval format: 1 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 30 degrees

===
Solar Longitude: 004.6 Sol Number: 010 Change in degrees is +.5 Julian date is: J0039010
Solar Longitude: 004.1 Sol Number: 009 Change in degrees is +.4 Julian date is: J0039009
Solar Longitude: 003.7 Sol Number: 008 Change in degrees is +.5 Julian date is: J0039008
#6>

Note that Solar Longitude measurement varies as a function of location in orbit. Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other. Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars date as J00##### (and set Search term)
Perihelion occurred in 2026 at Ls 251 on Sol 486 - Earth Date 2026/03/27 Next: (estimated) 2028/05/15
Perihelion occurred in 2024 at Ls 251 on Sol 485 - Earth Date 2024/05/08 Next: (estimated) 2026/03/06 (actual) 2026/03/26
Perihelion occurred in 2022 at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion Earth Dates: Next: 2027/03/04 Earlier: 2025/04/16, 2023/05/30, 2021/07/12, 2019/08/25, 2017/10/07, 2015/11/20
Aphelion occurred at--- Ls 071 on Sol 152.
Aphelion occurred near Ls 070 on Sol 153 (per http://www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations. The calculations use tenths of hours. The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun. Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

Aphelion of Mars is due March 04, 2027 Sol 151-152 Note velocity of Mars was 22.0 km/s nearing Aphelion (21.97 km/s)
Perhelion of Mars is due May, 2028 Sol 251 Note velocity of Mars was 26.5 km/s nearing Perihelion 2026/03/26
Mars passed through 0 Radial Distance on outbound leg Sol 633 of Year 38 2026/08/25 Solar Longitude is 341.1 (90 degrees season)
Mars will pass through 0 Radial Distance on inbound leg Sol 219 at longitude 71 270 degrees seasonal)
Conversion between seasons and physical frameworks: L_s = theta + 251 theta = L_s - 251

===
Distance: Mars >> Sun per theskylive.com: 234,839,350 km [23.4 km/s] Difference is +179153 <= +7465 km/hour at 12.0 on 10/10 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 234,660,197 km [23.4 km/s] Difference is +179855 <= +7494 km/hour at 12.0 on 10/09 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 234,480,342 km [23.4 km/s] Difference is +180492 <= +7521 km/hour at 12.0 on 10/08 (time 12:00) (24.0 hours)
>13

Velocity along the orbit is NOT the same thing as velocity change of the radial distance to the Sun. Both are shown in the section above.
Observation: The sky view is ** filled ** with objects and some have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth. The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth. Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

=== Mars is in Regular movement as seen from Earth.
Mars is in cancer – we in NewMars have an opportunity to visit some of the stars in Cancer during this period
Next ahead: 3 bright stars across path HIP 42578 RA 8h 40m 43.2s
Bright star Magnitude 7.72 TYC 1395-2334-1 RA 8h 37m 37s Day 2 sitting on 6 hours marker
14>

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18,2:36,3:54,4:72,5:90,6:108,7:126,8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324, 19:342,20:360,21:378,22:396

Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ minutes round trip.

=== Time estimate will change below 234 megaKm
Earth Distance in km: 2026/10/09 239,104,924 (decreasing)
Earth Distance in km: 2026/10/09 240,190,756 (decreasing)
Earth Distance in km: 2026/10/08 241,270,129 (decreasing)
>15

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in Year 36. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth. Communications delays in that circumstance will increase due to the extra distance to be covered. Mr. Musk indicated he expects such communication will be handled by laser. Location would be optimum at poles of solar plane.

This web site offers an online model of the solar system: www.solarsystemscope.com
This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===
Sol 010 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<< 37 is skip day on Mars
Month 01 extends from Sol 1 through 28. <<== There are 28 Sols in Month 01. See post 82 of Holidays topic for current details
Direct path to source: http://newmars.com/forums/viewtopic.php ... 57#p154257
Sol 010 is Tuesday in the Proposed Business calendar for Mars. Sol 667 Skip Day on Mars. Next is near 24 or 37 of Year 39
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Year 38 started November 12, 2024 on Earth
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

Days of the Week Alignment:
Days of the week fall behind Earth due to the longer Sol, but they also change when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036* or J0037*
The most recent End-Of-Quarter change occurred: … The search specified above gave 11 pages of results.

For current weather on Mars see:

***https://mars.nasa.gov/insight/weather/***
***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ ... ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar Copyright ® 2023 NewMars.com Mars Society
Su Mo Tu We Th Fr Sa
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28

Recruiting text may be found at the bottom of this post: http://newmars.com/forums/viewtopic.php ... 57#p154257
Copyright the Mars Society All Rights Reserved

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 39

Post by **tahanson43206** » Fri Oct 09, 2026 2:38 pm

===
Today on Mars: 0039/01/09 Monday Days of the week OFFSET 4 with Earth. (count from Mars to Earth )
Sol 009 Business Month 01 First month of Quarter 1 of Year 39
Today on Earth: 2026/10/09 Friday
>16

To see how this calendar works, we show the standard 28 day month at the bottom of this daily report.
There are 20 months of 28 Sols and 4 months of 27 Sols at the end of the four six-month quarters.
New Years Eve is extended to align the Business Calendar for Mars with the Astronomical calendar.
Business and Astronomical both start at zero (to the nanosecond) on New Year's Day.
This calendar has been in operation for two full Mars years (36 and 37). We are in Year 38

This calendar is NOT the Darian Calendar!

Per http://www-mars.lmd.jussieu.fr/mars/tim ... _time.html also see: in-the-sky.org for opposition/perigee/aphelion

Martian Year: 39 Martian Astronomical Interval in 12 interval format: 1 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 30 degrees

===
Solar Longitude: 004.1 Sol Number: 009 Change in degrees is +.4 Julian date is: J0039009
Solar Longitude: 003.7 Sol Number: 008 Change in degrees is +.5 Julian date is: J0039008
Solar Longitude: 003.2 Sol Number: 007 Change in degrees is +.5 Julian date is: J0039007
#6>

Note that Solar Longitude measurement varies as a function of location in orbit. Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other. Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars date as J00##### (and set Search term)
Perihelion occurred in 2026 at Ls 251 on Sol 486 - Earth Date 2026/03/27 Next: (estimated) 2028/05/15
Perihelion occurred in 2024 at Ls 251 on Sol 485 - Earth Date 2024/05/08 Next: (estimated) 2026/03/06 (actual) 2026/03/26
Perihelion occurred in 2022 at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion Earth Dates: Next: 2027/03/04 Earlier: 2025/04/16, 2023/05/30, 2021/07/12, 2019/08/25, 2017/10/07, 2015/11/20
Aphelion occurred at--- Ls 071 on Sol 152.
Aphelion occurred near Ls 070 on Sol 153 (per http://www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations. The calculations use tenths of hours. The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun. Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

Aphelion of Mars is due March 04, 2027 Sol 151-152 Note velocity of Mars was 22.0 km/s nearing Aphelion (21.97 km/s)
Perhelion of Mars is due May, 2028 Sol 251 Note velocity of Mars was 26.5 km/s nearing Perihelion 2026/03/26
Mars passed through 0 Radial Distance on outbound leg Sol 633 of Year 38 2026/08/25 Solar Longitude is 341.1 (90 degrees season)
Mars will pass through 0 Radial Distance on inbound leg Sol 219 at longitude 71 270 degrees seasonal)
Conversion between seasons and physical frameworks: L_s = theta + 251 theta = L_s - 251

===
Distance: Mars >> Sun per theskylive.com: 234,660,197 km [23.4 km/s] Difference is +179855 <= +7494 km/hour at 12.0 on 10/09 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 234,480,342 km [23.4 km/s] Difference is +180492 <= +7521 km/hour at 12.0 on 10/08 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 234,299,850 km [23.5 km/s] Difference is +181120 <= +7547 km/hour at 12.0 on 10/07 (time 12:00) (24.0 hours)
>13

Velocity along the orbit is NOT the same thing as velocity change of the radial distance to the Sun. Both are shown in the section above.
Observation: The sky view is ** filled ** with objects and some have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth. The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth. Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

=== Mars is in Regular movement as seen from Earth.
Mars is in cancer – we in NewMars have an opportunity to visit some of the stars in Cancer during this period
Next ahead: Bright star Magnitude 7.72 TYC 1395-2334-1 RA 8h 37m 37s
galaxy just below path: PGC 1607316 RA 8h 35m 31.4s Day 2 just past Mars
14>

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18,2:36,3:54,4:72,5:90,6:108,7:126,8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324, 19:342,20:360,21:378,22:396

Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ minutes round trip.

=== Time estimate will change below 234 megaKm
Earth Distance in km: 2026/10/09 240,190,756 (decreasing)
Earth Distance in km: 2026/10/08 241,270,129 (decreasing)
Earth Distance in km: 2026/10/07 242,342,656 (decreasing)
>15

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in Year 36. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth. Communications delays in that circumstance will increase due to the extra distance to be covered. Mr. Musk indicated he expects such communication will be handled by laser. Location would be optimum at poles of solar plane.

This web site offers an online model of the solar system: www.solarsystemscope.com
This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===
Sol 009 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<< 37 is skip day on Mars
Month 01 extends from Sol 1 through 28. <<== There are 28 Sols in Month 01. See post 82 of Holidays topic for current details
Direct path to source: http://newmars.com/forums/viewtopic.php ... 57#p154257
Sol 009 is Monday in the Proposed Business calendar for Mars. Sol 667 Skip Day on Mars. Next is near 24 or 37 of Year 39
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Year 38 started November 12, 2024 on Earth
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

Days of the Week Alignment:
Days of the week fall behind Earth due to the longer Sol, but they also change when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036* or J0037*
The most recent End-Of-Quarter change occurred: … The search specified above gave 11 pages of results.

For current weather on Mars see:

***https://mars.nasa.gov/insight/weather/***
***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ ... ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar Copyright ® 2023 NewMars.com Mars Society
Su Mo Tu We Th Fr Sa
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28

Recruiting text may be found at the bottom of this post: http://newmars.com/forums/viewtopic.php ... 57#p154257
Copyright the Mars Society All Rights Reserved

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 39

Post by **tahanson43206** » Thu Oct 08, 2026 6:13 pm

===
Today on Mars: 0039/01/08 Sunday Days of the week OFFSET 4 with Earth. (count from Mars to Earth )
Sol 008 Business Month 01 First month of Quarter 1 of Year 39
Today on Earth: 2026/10/08 Thursday
>16

To see how this calendar works, we show the standard 28 day month at the bottom of this daily report.
There are 20 months of 28 Sols and 4 months of 27 Sols at the end of the four six-month quarters.
New Years Eve is extended to align the Business Calendar for Mars with the Astronomical calendar.
Business and Astronomical both start at zero (to the nanosecond) on New Year's Day.
This calendar has been in operation for two full Mars years (36 and 37). We are in Year 38

This calendar is NOT the Darian Calendar!

Per http://www-mars.lmd.jussieu.fr/mars/tim ... _time.html also see: in-the-sky.org for opposition/perigee/aphelion

Martian Year: 39 Martian Astronomical Interval in 12 interval format: 1 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 30 degrees

===
Solar Longitude: 003.7 Sol Number: 008 Change in degrees is +.5 Julian date is: J0039008
Solar Longitude: 003.2 Sol Number: 007 Change in degrees is +.5 Julian date is: J0039007
Solar Longitude: 002.7 Sol Number: 006 Change in degrees is +.5 Julian date is: J0039006
#6>

Note that Solar Longitude measurement varies as a function of location in orbit. Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other. Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars date as J00##### (and set Search term)
Perihelion occurred in 2026 at Ls 251 on Sol 486 - Earth Date 2026/03/27 Next: (estimated) 2028/05/15
Perihelion occurred in 2024 at Ls 251 on Sol 485 - Earth Date 2024/05/08 Next: (estimated) 2026/03/06 (actual) 2026/03/26
Perihelion occurred in 2022 at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion Earth Dates: Next: 2027/03/04 Earlier: 2025/04/16, 2023/05/30, 2021/07/12, 2019/08/25, 2017/10/07, 2015/11/20
Aphelion occurred at--- Ls 071 on Sol 152.
Aphelion occurred near Ls 070 on Sol 153 (per http://www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations. The calculations use tenths of hours. The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun. Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

Aphelion of Mars is due March 04, 2027 Sol 151-152 Note velocity of Mars was 22.0 km/s nearing Aphelion (21.97 km/s)
Perhelion of Mars is due May, 2028 Sol 251 Note velocity of Mars was 26.5 km/s nearing Perihelion 2026/03/26
Mars passed through 0 Radial Distance on outbound leg Sol 633 of Year 38 2026/08/25 Solar Longitude is 341.1 (90 degrees season)
Mars will pass through 0 Radial Distance on inbound leg Sol 219 at longitude 71 270 degrees seasonal)
Conversion between seasons and physical frameworks: L_s = theta + 251 theta = L_s - 251

===
Distance: Mars >> Sun per theskylive.com: 234,480,342 km [23.4 km/s] Difference is +180492 <= +7521 km/hour at 12.0 on 10/08 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 234,299,850 km [23.5 km/s] Difference is +181120 <= +7547 km/hour at 12.0 on 10/07 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 234,118,730 km [23.5 km/s] Difference is +181788 <= +7575 km/hour at 12.0 on 10/06 (time 12:00) (24.0 hours)
>13

Velocity along the orbit is NOT the same thing as velocity change of the radial distance to the Sun. Both are shown in the section above.
Observation: The sky view is ** filled ** with objects and some have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth. The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth. Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

=== Mars is in Regular movement as seen from Earth.
Mars is in cancer – we in NewMars have an opportunity to visit some of the stars in Cancer during this period
Next ahead: galaxy just below path: PGC 1607316 RA 8h 35m 31.4s
14>

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18,2:36,3:54,4:72,5:90,6:108,7:126,8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324, 19:342,20:360,21:378,22:396

Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ minutes round trip.

=== Time estimate will change below 234 megaKm
Earth Distance in km: 2026/10/08 241,270,129 (decreasing)
Earth Distance in km: 2026/10/07 242,342,656 (decreasing)
Earth Distance in km: 2026/10/06 243,408,282 (decreasing)
>15

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in Year 36. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth. Communications delays in that circumstance will increase due to the extra distance to be covered. Mr. Musk indicated he expects such communication will be handled by laser. Location would be optimum at poles of solar plane.

This web site offers an online model of the solar system: www.solarsystemscope.com
This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===
Sol 008 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<< 37 is skip day on Mars
Month 01 extends from Sol 1 through 28. <<== There are 28 Sols in Month 01. See post 82 of Holidays topic for current details
Direct path to source: http://newmars.com/forums/viewtopic.php ... 57#p154257
Sol 008 is Sunday in the Proposed Business calendar for Mars. Sol 667 Skip Day on Mars. Next is near 24 or 37 of Year 39
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Year 38 started November 12, 2024 on Earth
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

Days of the Week Alignment:
Days of the week fall behind Earth due to the longer Sol, but they also change when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036* or J0037*
The most recent End-Of-Quarter change occurred: … The search specified above gave 11 pages of results.

For current weather on Mars see:

***https://mars.nasa.gov/insight/weather/***
***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ ... ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar Copyright ® 2023 NewMars.com Mars Society
Su Mo Tu We Th Fr Sa
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28

Recruiting text may be found at the bottom of this post: http://newmars.com/forums/viewtopic.php ... 57#p154257
Copyright the Mars Society All Rights Reserved

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 39

Post by **tahanson43206** » Thu Oct 08, 2026 1:37 am

===
Today on Mars: 0039/01/07 Saturday Days of the week OFFSET 4 with Earth. (count from Mars to Earth )
Sol 007 Business Month 01 First month of Quarter 1 of Year 39
Today on Earth: 2026/10/07 Wednesday
>16

To see how this calendar works, we show the standard 28 day month at the bottom of this daily report.
There are 20 months of 28 Sols and 4 months of 27 Sols at the end of the four six-month quarters.
New Years Eve is extended to align the Business Calendar for Mars with the Astronomical calendar.
Business and Astronomical both start at zero (to the nanosecond) on New Year's Day.
This calendar has been in operation for two full Mars years (36 and 37). We are in Year 38

This calendar is NOT the Darian Calendar!

Per http://www-mars.lmd.jussieu.fr/mars/tim ... _time.html also see: in-the-sky.org for opposition/perigee/aphelion

Martian Year: 39 Martian Astronomical Interval in 12 interval format: 1 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 30 degrees

===
Solar Longitude: 003.2 Sol Number: 007 Change in degrees is +.5 Julian date is: J0039007
Solar Longitude: 002.7 Sol Number: 006 Change in degrees is +.5 Julian date is: J0039006
Solar Longitude: 002.2 Sol Number: 005 Change in degrees is +.5 Julian date is: J0039005
#6>

Note that Solar Longitude measurement varies as a function of location in orbit. Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other. Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars date as J00##### (and set Search term)
Perihelion occurred in 2026 at Ls 251 on Sol 486 - Earth Date 2026/03/27 Next: (estimated) 2028/05/15
Perihelion occurred in 2024 at Ls 251 on Sol 485 - Earth Date 2024/05/08 Next: (estimated) 2026/03/06 (actual) 2026/03/26
Perihelion occurred in 2022 at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion Earth Dates: Next: 2027/03/04 Earlier: 2025/04/16, 2023/05/30, 2021/07/12, 2019/08/25, 2017/10/07, 2015/11/20
Aphelion occurred at--- Ls 071 on Sol 152.
Aphelion occurred near Ls 070 on Sol 153 (per http://www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations. The calculations use tenths of hours. The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun. Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

Aphelion of Mars is due March 04, 2027 Sol 151-152 Note velocity of Mars was 22.0 km/s nearing Aphelion (21.97 km/s)
Perhelion of Mars is due May, 2028 Sol 251 Note velocity of Mars was 26.5 km/s nearing Perihelion 2026/03/26
Mars passed through 0 Radial Distance on outbound leg Sol 633 of Year 38 2026/08/25 Solar Longitude is 341.1 (90 degrees season)
Mars will pass through 0 Radial Distance on inbound leg Sol 219 at longitude 71 270 degrees seasonal)
Conversion between seasons and physical frameworks: L_s = theta + 251 theta = L_s - 251

===
Distance: Mars >> Sun per theskylive.com: 234,299,850 km [23.5 km/s] Difference is +181120 <= +7547 km/hour at 12.0 on 10/07 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 234,118,730 km [23.5 km/s] Difference is +181788 <= +7575 km/hour at 12.0 on 10/06 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 233,936,942 km [23.5 km/s] Difference is +182386 <= +7599 km/hour at 12.0 on 10/05 (time 12:00) (24.0 hours)
>13

Velocity along the orbit is NOT the same thing as velocity change of the radial distance to the Sun. Both are shown in the section above.
Observation: The sky view is ** filled ** with objects and some have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth. The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth. Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

=== Mars is in Regular movement as seen from Earth.
Mars is in cancer – we in NewMars have an opportunity to visit some of the stars in Cancer during this period
Next ahead:
Galaxy just below path ahead of 5.5 hours marker: 1615686 RA 8h 30m 56.1s Day 2 just past Mars
Star in path 1387-40-1 RA 8h 28m 44.7s Day 2 above 5.5 hours marker Day 3 still there but only for a few minutes
14>

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18,2:36,3:54,4:72,5:90,6:108,7:126,8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324, 19:342,20:360,21:378,22:396

Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ minutes round trip.

=== Time estimate will change below 252 megaKm
Earth Distance in km: 2026/10/07 242,342,656 (decreasing)
Earth Distance in km: 2026/10/06 243,408,282 (decreasing)
Earth Distance in km: 2026/10/05 244,467,245 (decreasing)
>15

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in Year 36. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth. Communications delays in that circumstance will increase due to the extra distance to be covered. Mr. Musk indicated he expects such communication will be handled by laser. Location would be optimum at poles of solar plane.

This web site offers an online model of the solar system: www.solarsystemscope.com
This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===
Sol 007 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<< 37 is skip day on Mars
Month 01 extends from Sol 1 through 28. <<== There are 28 days in Month 01. See post 82 of Holidays topic for current details
Direct path to source: http://newmars.com/forums/viewtopic.php ... 57#p154257
Sol 007 is Saturday in the Proposed Business calendar for Mars. Sol 667 Skip Day on Mars. Next is near 24 or 37 of Year 39
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Year 38 started November 12, 2024 on Earth
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

Days of the Week Alignment:
Days of the week fall behind Earth due to the longer Sol, but they also change when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036* or J0037*
The most recent End-Of-Quarter change occurred: … The search specified above gave 11 pages of results.

For current weather on Mars see:

***https://mars.nasa.gov/insight/weather/***
***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ ... ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar Copyright ® 2023 NewMars.com Mars Society
Su Mo Tu We Th Fr Sa
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28

Recruiting text may be found at the bottom of this post: http://newmars.com/forums/viewtopic.php ... 57#p154257
Copyright the Mars Society All Rights Reserved

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 39

Post by **tahanson43206** » Tue Oct 06, 2026 9:29 pm

===
Today on Mars: 0039/01/06 Friday Days of the week OFFSET 4 with Earth. (count from Mars to Earth )
Sol 006 Business Month 01 First month of Quarter 1 of Year 39
Today on Earth: 2026/10/06 Tuesday
>16

To see how this calendar works, we show the standard 28 day month at the bottom of this daily report.
There are 20 months of 28 Sols and 4 months of 27 Sols at the end of the four six-month quarters.
New Years Eve is extended to align the Business Calendar for Mars with the Astronomical calendar.
Business and Astronomical both start at zero (to the nanosecond) on New Year's Day.
This calendar has been in operation for two full Mars years (36 and 37). We are in Year 38

This calendar is NOT the Darian Calendar!

Per http://www-mars.lmd.jussieu.fr/mars/tim ... _time.html also see: in-the-sky.org for opposition/perigee/aphelion

Martian Year: 39 Martian Astronomical Interval in 12 interval format: 1 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 30 degrees

===
Solar Longitude: 002.7 Sol Number: 006 Change in degrees is +.5 Julian date is: J0039006
Solar Longitude: 002.2 Sol Number: 005 Change in degrees is +.5 Julian date is: J0039005
Solar Longitude: 001.7 Sol Number: 004 Change in degrees is +.5 Julian date is: J0039004
#6>

Note that Solar Longitude measurement varies as a function of location in orbit. Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other. Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars date as J00##### (and set Search term)
Perihelion occurred in 2026 at Ls 251 on Sol 486 - Earth Date 2026/03/27 Next: (estimated) 2028/05/15
Perihelion occurred in 2024 at Ls 251 on Sol 485 - Earth Date 2024/05/08 Next: (estimated) 2026/03/06 (actual) 2026/03/26
Perihelion occurred in 2022 at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion Earth Dates: Next: 2027/03/04 Earlier: 2025/04/16, 2023/05/30, 2021/07/12, 2019/08/25, 2017/10/07, 2015/11/20
Aphelion occurred at--- Ls 071 on Sol 152.
Aphelion occurred near Ls 070 on Sol 153 (per http://www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations. The calculations use tenths of hours. The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun. Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

Aphelion of Mars is due March 04, 2027 Sol 151-152 Note velocity of Mars was 22.0 km/s nearing Aphelion (21.97 km/s)
Perhelion of Mars is due May, 2028 Sol 251 Note velocity of Mars was 26.5 km/s nearing Perihelion 2026/03/26
Mars passed through 0 Radial Distance on outbound leg Sol 633 of Year 38 2026/08/25 Solar Longitude is 341.1 (90 degrees season)
Mars will pass through 0 Radial Distance on inbound leg Sol 219 at longitude 71 270 degrees seasonal)
Conversion between seasons and physical frameworks: L_s = theta + 251 theta = L_s - 251

===
Distance: Mars >> Sun per theskylive.com: 234,118,730 km [23.5 km/s] Difference is +181788 <= +7575 km/hour at 12.0 on 10/06 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 233,936,942 km [23.5 km/s] Difference is +182386 <= +7599 km/hour at 12.0 on 10/05 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 233,754,556 km [23.5 km/s] Difference is +182974 <= +7624 km/hour at 12.0 on 10/04 (time 12:00) (24.0 hours)
>13

Velocity along the orbit is NOT the same thing as velocity change of the radial distance to the Sun. Both are shown in the section above.
Observation: The sky view is ** filled ** with objects and some have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth. The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth. Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

=== Mars is in Regular movement as seen from Earth.
Mars is in cancer – we in NewMars have an opportunity to visit some of the stars in Cancer during this period
Next ahead: Galaxy just below path ahead of 5.5 hours marker: 1615686 RA 8h 30m 56.1s
Star in path 1387-40-1 RA 8h 28m 44.7s Day 2 above 5.5 hours marker
We are in a field of galaxies! PGC 1622204 RA 8h 26m 21.6s Day 2 just past Mars Day 3 still visible before reset
14>

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18,2:36,3:54,4:72,5:90,6:108,7:126,8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324, 19:342,20:360,21:378,22:396

Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ minutes round trip.

=== Time estimate will change below 252 megaKm
Earth Distance in km: 2026/10/06 243,408,282 (decreasing)
Earth Distance in km: 2026/10/05 244,467,245 (decreasing)
Earth Distance in km: 2026/10/04 245,519,175 (decreasing)
>15

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in Year 36. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth. Communications delays in that circumstance will increase due to the extra distance to be covered. Mr. Musk indicated he expects such communication will be handled by laser. Location would be optimum at poles of solar plane.

This web site offers an online model of the solar system: www.solarsystemscope.com
This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===
Sol 006 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<< 37 is skip day on Mars
Month 01 extends from Sol 1 through 28. <<== There are 28 days in Month 01. See post 82 of Holidays topic for current details
Direct path to source: http://newmars.com/forums/viewtopic.php ... 57#p154257
Sol 006 is Friday in the Proposed Business calendar for Mars. Sol 667 Skip Day on Mars. Next is near 37 of Year 39
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Year 38 started November 12, 2024 on Earth
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

Days of the Week Alignment:
Days of the week fall behind Earth due to the longer Sol, but they also change when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036* or J0037*
The most recent End-Of-Quarter change occurred: … The search specified above gave 11 pages of results.

For current weather on Mars see:

***https://mars.nasa.gov/insight/weather/***
***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ ... ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar Copyright ® 2023 NewMars.com Mars Society
Su Mo Tu We Th Fr Sa
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28

Recruiting text may be found at the bottom of this post: http://newmars.com/forums/viewtopic.php ... 57#p154257
Copyright the Mars Society All Rights Reserved

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 39

Post by **tahanson43206** » Mon Oct 05, 2026 6:22 pm

===
Today on Mars: 0039/01/05 Thursday Days of the week OFFSET 4 with Earth. (count from Mars to Earth )
Sol 005 Business Month 01 First month of Quarter 1 of Year 39
Today on Earth: 2026/10/05 Monday
>16

To see how this calendar works, we show the standard 28 day month at the bottom of this daily report.
There are 20 months of 28 Sols and 4 months of 27 Sols at the end of the four six-month quarters.
New Years Eve is extended to align the Business Calendar for Mars with the Astronomical calendar.
Business and Astronomical both start at zero (to the nanosecond) on New Year's Day.
This calendar has been in operation for two full Mars years (36 and 37). We are in Year 38

This calendar is NOT the Darian Calendar!

Per http://www-mars.lmd.jussieu.fr/mars/tim ... _time.html also see: in-the-sky.org for opposition/perigee/aphelion

Martian Year: 39 Martian Astronomical Interval in 12 interval format: 1 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 30 degrees

===
Solar Longitude: 002.2 Sol Number: 005 Change in degrees is +.5 Julian date is: J0039005
Solar Longitude: 001.7 Sol Number: 004 Change in degrees is +.5 Julian date is: J0039004
Solar Longitude: 001.2 Sol Number: 003 Change in degrees is +.5 Julian date is: J0039003
#6>

Note that Solar Longitude measurement varies as a function of location in orbit. Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other. Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars date as J00##### (and set Search term)
Perihelion occurred in 2026 at Ls 251 on Sol 486 - Earth Date 2026/03/27 Next: (estimated) 2028/05/15
Perihelion occurred in 2024 at Ls 251 on Sol 485 - Earth Date 2024/05/08 Next: (estimated) 2026/03/06 (actual) 2026/03/26
Perihelion occurred in 2022 at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion Earth Dates: Next: 2027/03/04 Earlier: 2025/04/16, 2023/05/30, 2021/07/12, 2019/08/25, 2017/10/07, 2015/11/20
Aphelion occurred at--- Ls 071 on Sol 152.
Aphelion occurred near Ls 070 on Sol 153 (per http://www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations. The calculations use tenths of hours. The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun. Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

Aphelion of Mars is due March 04, 2027 Sol 151-152 Note velocity of Mars was 22.0 km/s nearing Aphelion (21.97 km/s)
Perhelion of Mars is due May, 2028 Sol 251 Note velocity of Mars was 26.5 km/s nearing Perihelion 2026/03/26
Mars passed through 0 Radial Distance on outbound leg Sol 633 of Year 38 2026/08/25 Solar Longitude is 341.1 (90 degrees season)
Mars will pass through 0 Radial Distance on inbound leg Sol 219 at longitude 71 270 degrees seasonal)
Conversion between seasons and physical frameworks: L_s = theta + 251 theta = L_s - 251

===
Distance: Mars >> Sun per theskylive.com: 233,936,942 km [23.5 km/s] Difference is +182386 <= +7599 km/hour at 12.0 on 10/05 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 233,754,556 km [23.5 km/s] Difference is +182974 <= +7624 km/hour at 12.0 on 10/04 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 233,571,582 km [23.5 km/s] Difference is +183590 <= +7650 km/hour at 12.0 on 10/03 (time 12:00) (24.0 hours)
>13

Velocity along the orbit is NOT the same thing as velocity change of the radial distance to the Sun. Both are shown in the section above.
Observation: The sky view is ** filled ** with objects and some have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth. The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth. Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

=== Mars is in Regular movement as seen from Earth.
Mars is in cancer – we in NewMars have an opportunity to visit some of the stars in Cancer during this period
Next ahead: Star in path 1387-40-1 RA 8h 28m 44.7s
We are in a field of galaxies! PGC 1622204 RA 8h 26m 21.6s Day 2 just past Mars
14>

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18,2:36,3:54,4:72,5:90,6:108,7:126,8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324, 19:342,20:360,21:378,22:396

Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ minutes round trip.

=== Time estimate will change below 252 megaKm
Earth Distance in km: 2026/10/05 244,467,245 (decreasing)
Earth Distance in km: 2026/10/04 245,519,175 (decreasing)
Earth Distance in km: 2026/10/03 246,564,051 (decreasing)
>15

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in Year 36. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth. Communications delays in that circumstance will increase due to the extra distance to be covered. Mr. Musk indicated he expects such communication will be handled by laser. Location would be optimum at poles of solar plane.

This web site offers an online model of the solar system: www.solarsystemscope.com
This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===
Sol 005 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<< 37 is skip day on Mars
Month 01 extends from Sol 1 through 28. <<== There are 28 days in Month 01. See post 82 of Holidays topic for current details
Direct path to source: http://newmars.com/forums/viewtopic.php ... 57#p154257
Sol 005 is Thursday in the Proposed Business calendar for Mars. Sol 667 Skip Day on Mars. Next is near 37 of Year 39
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Year 38 started November 12, 2024 on Earth
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

Days of the Week Alignment:
Days of the week fall behind Earth due to the longer Sol, but they also change when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036* or J0037*
The most recent End-Of-Quarter change occurred: … The search specified above gave 11 pages of results.

For current weather on Mars see:

***https://mars.nasa.gov/insight/weather/***
***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ ... ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar Copyright ® 2023 NewMars.com Mars Society
Su Mo Tu We Th Fr Sa
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28

Recruiting text may be found at the bottom of this post: http://newmars.com/forums/viewtopic.php ... 57#p154257
Copyright the Mars Society All Rights Reserved

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 39

Post by **tahanson43206** » Sun Oct 04, 2026 3:56 pm

===
Today on Mars: 0039/01/04 Wednesday Days of the week OFFSET 4 with Earth. (count from Mars to Earth )
Sol 004 Business Month 01 First month of Quarter 1 of Year 39
Today on Earth: 2026/10/04 Sunday
>16

To see how this calendar works, we show the standard 28 day month at the bottom of this daily report.
There are 20 months of 28 Sols and 4 months of 27 Sols at the end of the four six-month quarters.
New Years Eve is extended to align the Business Calendar for Mars with the Astronomical calendar.
Business and Astronomical both start at zero (to the nanosecond) on New Year's Day.
This calendar has been in operation for two full Mars years (36 and 37). We are in Year 38

This calendar is NOT the Darian Calendar!

Per http://www-mars.lmd.jussieu.fr/mars/tim ... _time.html also see: in-the-sky.org for opposition/perigee/aphelion

Martian Year: 39 Martian Astronomical Interval in 12 interval format: 1 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 30 degrees

===
Solar Longitude: 001.7 Sol Number: 004 Change in degrees is +.5 Julian date is: J0039004
Solar Longitude: 001.2 Sol Number: 003 Change in degrees is +.5 Julian date is: J0039003
Solar Longitude: 000.7 Sol Number: 002 Change in degrees is +.5 Julian date is: J0039002
#6>

Note that Solar Longitude measurement varies as a function of location in orbit. Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other. Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars date as J00##### (and set Search term)
Perihelion occurred in 2026 at Ls 251 on Sol 486 - Earth Date 2026/03/27 Next: (estimated) 2028/05/15
Perihelion occurred in 2024 at Ls 251 on Sol 485 - Earth Date 2024/05/08 Next: (estimated) 2026/03/06 (actual) 2026/03/26
Perihelion occurred in 2022 at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion Earth Dates: Next: 2027/03/04 Earlier: 2025/04/16, 2023/05/30, 2021/07/12, 2019/08/25, 2017/10/07, 2015/11/20
Aphelion occurred at--- Ls 071 on Sol 152.
Aphelion occurred near Ls 070 on Sol 153 (per http://www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations. The calculations use tenths of hours. The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun. Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

Aphelion of Mars is due March 04, 2027 Sol 151-152 Note velocity of Mars was 22.0 km/s nearing Aphelion (21.97 km/s)
Perhelion of Mars is due May, 2028 Sol 251 Note velocity of Mars was 26.5 km/s nearing Perihelion 2026/03/26
Mars passed through 0 Radial Distance on outbound leg Sol 633 of Year 38 2026/08/25 Solar Longitude is 341.1 (90 degrees season)
Mars will pass through 0 Radial Distance on inbound leg Sol 219 at longitude 71 270 degrees seasonal)
Conversion between seasons and physical frameworks: L_s = theta + 251 theta = L_s - 251

===
Distance: Mars >> Sun per theskylive.com: 233,754,556 km [23.5 km/s] Difference is +182974 <= +7624 km/hour at 12.0 on 10/04 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 233,571,582 km [23.5 km/s] Difference is +183590 <= +7650 km/hour at 12.0 on 10/03 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 233,387,992 km [23.6 km/s] Difference is +183854 <= +7661 km/hour at 12.0 on 10/02 (time 12:00) (24.0 hours)
>13

Velocity along the orbit is NOT the same thing as velocity change of the radial distance to the Sun. Both are shown in the section above.
Observation: The sky view is ** filled ** with objects and some have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth. The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth. Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

=== Mars is in Regular movement as seen from Earth.
Mars is in cancer – we in NewMars have an opportunity to visit some of the stars in Cancer during this period
Next ahead: We are in a field of galaxies! PGC 1622204 RA 8h 26m 21.6s
Micro-Boomer above path HIP 41083 RA 8h 22m 56.5s Day 2 above 11 hours marker
14>

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18,2:36,3:54,4:72,5:90,6:108,7:126,8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324, 19:342,20:360,21:378,22:396

Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ minutes round trip.

=== Time estimate will change below 252 megaKm
Earth Distance in km: 2026/10/04 245,519,175 (decreasing)
Earth Distance in km: 2026/10/03 246,564,051 (decreasing)
Earth Distance in km: 2026/10/02 247,602,089 (decreasing)
>15

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in Year 36. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth. Communications delays in that circumstance will increase due to the extra distance to be covered. Mr. Musk indicated he expects such communication will be handled by laser. Location would be optimum at poles of solar plane.

This web site offers an online model of the solar system: www.solarsystemscope.com
This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===
Sol 004 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<< 37 is skip day on Mars
Month 01 extends from Sol 1 through 28. <<== There are 28 days in Month 01. See post 82 of Holidays topic for current details
Direct path to source: http://newmars.com/forums/viewtopic.php ... 57#p154257
Sol 004 is Wednesday in the Proposed Business calendar for Mars. Sol 667 Skip Day on Mars. Next is near 37 of Year 39
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Year 38 started November 12, 2024 on Earth
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

Days of the Week Alignment:
Days of the week fall behind Earth due to the longer Sol, but they also change when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036* or J0037*
The most recent End-Of-Quarter change occurred: … The search specified above gave 11 pages of results.

For current weather on Mars see:

***https://mars.nasa.gov/insight/weather/***
***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ ... ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar Copyright ® 2023 NewMars.com Mars Society
Su Mo Tu We Th Fr Sa
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28

Recruiting text may be found at the bottom of this post: http://newmars.com/forums/viewtopic.php ... 57#p154257
Copyright the Mars Society All Rights Reserved

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 39

Post by **tahanson43206** » Sat Oct 03, 2026 3:55 pm

===
Today on Mars: 0039/01/03 Tuesday Days of the week OFFSET 4 with Earth. (count from Mars to Earth )
Sol 003 Business Month 01 First month of Quarter 1 of Year 39
Today on Earth: 2026/10/03 Saturday
>16

To see how this calendar works, we show the standard 28 day month at the bottom of this daily report.
There are 20 months of 28 Sols and 4 months of 27 Sols at the end of the four six-month quarters.
New Years Eve is extended to align the Business Calendar for Mars with the Astronomical calendar.
Business and Astronomical both start at zero (to the nanosecond) on New Year's Day.
This calendar has been in operation for two full Mars years (36 and 37). We are in Year 38

This calendar is NOT the Darian Calendar!

Per http://www-mars.lmd.jussieu.fr/mars/tim ... _time.html also see: in-the-sky.org for opposition/perigee/aphelion

Martian Year: 39 Martian Astronomical Interval in 12 interval format: 1 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 30 degrees

===
Solar Longitude: 001.2 Sol Number: 003 Change in degrees is +.5 Julian date is: J0039003
Solar Longitude: 000.7 Sol Number: 002 Change in degrees is +.5 Julian date is: J0039002
Solar Longitude: 000.2 Sol Number: 001 Change in degrees is +.5 Julian date is: J0039001 << First Sol of New Year
#6>

Note that Solar Longitude measurement varies as a function of location in orbit. Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other. Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars date as J00##### (and set Search term)
Perihelion occurred in 2026 at Ls 251 on Sol 486 - Earth Date 2026/03/27 Next: (estimated) 2028/05/15
Perihelion occurred in 2024 at Ls 251 on Sol 485 - Earth Date 2024/05/08 Next: (estimated) 2026/03/06 (actual) 2026/03/26
Perihelion occurred in 2022 at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion Earth Dates: Next: 2027/03/04 Earlier: 2025/04/16, 2023/05/30, 2021/07/12, 2019/08/25, 2017/10/07, 2015/11/20
Aphelion occurred at--- Ls 071 on Sol 152.
Aphelion occurred near Ls 070 on Sol 153 (per http://www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations. The calculations use tenths of hours. The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun. Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

Aphelion of Mars is due March 04, 2027 Sol 151-152 Note velocity of Mars was 22.0 km/s nearing Aphelion (21.97 km/s)
Perhelion of Mars is due May, 2028 Sol 251 Note velocity of Mars was 26.5 km/s nearing Perihelion 2026/03/26
Mars passed through 0 Radial Distance on outbound leg Sol 633 of Year 38 2026/08/25 Solar Longitude is 341.1 (90 degrees season)
Mars will pass through 0 Radial Distance on inbound leg Sol 219 at longitude 71 270 degrees seasonal)
Conversion between seasons and physical frameworks: L_s = theta + 251 theta = L_s - 251

===
Distance: Mars >> Sun per theskylive.com: 233,571,582 km [23.5 km/s] Difference is +183590 <= +7650 km/hour at 12.0 on 10/03 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 233,387,992 km [23.6 km/s] Difference is +183854 <= +7661 km/hour at 12.0 on 10/02 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 233,204,138 km [23.6 km/s] Difference is +185050 <= +7710 km/hour at 12.0 on 10/01 (time 12:00) (24.0 hours)
>13

Velocity along the orbit is NOT the same thing as velocity change of the radial distance to the Sun. Both are shown in the section above.
Observation: The sky view is ** filled ** with objects and some have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth. The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth. Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

=== Mars is in Regular movement as seen from Earth.
Mars is in Gemini – we in NewMars have an opportunity to visit some of the stars in Gemini during this period
Next ahead: Micro-Boomer above path HIP 41083 RA 8h 22m 56.5s
Galaxy below path PGC 1626483 RA 8h 20m (estimate) Day 2 below 5.5 hours marker Note RA 8h 20m 58.4s
Note Boomer above path: HIP 40866 RA 8h 20m 20.9s above 11 hours marker Day 2 upper right of view
14>

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18,2:36,3:54,4:72,5:90,6:108,7:126,8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324, 19:342,20:360,21:378,22:396

Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ minutes round trip.

=== Time estimate will change below 252 megaKm
Earth Distance in km: 2026/10/03 246,564,051 (decreasing)
Earth Distance in km: 2026/10/02 247,602,089 (decreasing)
Earth Distance in km: 2026/10/01 248,631,401 (decreasing)
>15

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in Year 36. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth. Communications delays in that circumstance will increase due to the extra distance to be covered. Mr. Musk indicated he expects such communication will be handled by laser. Location would be optimum at poles of solar plane.

This web site offers an online model of the solar system: www.solarsystemscope.com
This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===
Sol 003 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<< 37 is skip day on Mars
Month 01 extends from Sol 1 through 28. <<== There are 28 days in Month 01. See post 82 of Holidays topic for current details
Direct path to source: http://newmars.com/forums/viewtopic.php ... 57#p154257
Sol 003 is Tuesday in the Proposed Business calendar for Mars. Sol 667 Skip Day on Mars. Next is near 37 of Year 39
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Year 38 started November 12, 2024 on Earth
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

Days of the Week Alignment:
Days of the week fall behind Earth due to the longer Sol, but they also change when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036* or J0037*
The most recent End-Of-Quarter change occurred: … The search specified above gave 11 pages of results.

For current weather on Mars see:

***https://mars.nasa.gov/insight/weather/***
***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ ... ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar Copyright ® 2023 NewMars.com Mars Society
Su Mo Tu We Th Fr Sa
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28

Recruiting text may be found at the bottom of this post: http://newmars.com/forums/viewtopic.php ... 57#p154257
Copyright the Mars Society All Rights Reserved

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 39

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