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===
Today on Mars: 0038/21/24 Tuesday Days of the week OFFSET 2 with Earth. (count from Mars to Earth )
Sol 581 Business Month 21 Third month of Quarter 4 of Year 38
Today on Earth: 2026/07/02 Thursday Earth Date)
>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: 38 Martian Astronomical Interval in 12 interval format: 11 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 330 degrees
===
Solar Longitude: 311.1 Sol Number: 581 Change in degrees is +.6 Julian date is: J0038581
Solar Longitude: 310.5 Sol Number: 580 Change in degrees is +.6 Julian date is: J0038580
Solar Longitude: 309.9 Sol Number: 579 Change in degrees is +.5 Julian date is: J0038579
#3>
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 Perhelion 2026/03/26
===
Distance: Mars >> Sun per theskylive.com: 215,989,234 km [25.4 km/s] Difference is +169817 <= +7076 km/hour at 12.0 on 07/02 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 215,819,417 km [25.4 km/s] Difference is +168736 <= +7031 km/hour at 12.0 on 07/01 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 215,650,681 km [25.5 km/s] Difference is +167669 <= +6986 km/hour at 12.0 on 06/30 (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.
j
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 Taurus
Next ahead: no labeled objects ahead of 9 hours marker
Star above path TYC 1257-341-1 RA 3h 59m 49.2s Day 2 – past 9 hours
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 17 and 18 minutes. Communications delay would be 34+ minutes round trip.
=== Time estimate will change below 306 megaKm
Earth Distance in km: 2026/07/02 314,453,274 (decreasing)
Earth Distance in km: 2026/07/01 314,904,462 (decreasing)
Earth Distance in km: 2026/06/30 315,350,949 (decreasing)
6<#
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 It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022. Per earthsky.org, the date is December 8, 2022.
This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/
===
Sol 581 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 581 is Tuesday in the Proposed Business calendar for Mars. Sol 558 Skip Day on Mars. Next is near 558+37 of Year 38 595
##
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 21 of 24: <<== Third month of Quarter 4
Offline
Like button can go here
Place Holder for today's Calendar Update:
[51.4792N, 0.0000E] 07/03/2026, 13:00:01 Europe/London
Object: Mars [open sky map]
RA 04h 05m 26.5s Dec +20° 33' 11.9" Appar J2000
Mag: 1.34 (Estimated: JPL) Const: Taurus
Current ID: 240062
Total number of registered users: 19,630
Total number of topics: 9,058
Total number of posts: 235,744
Newest registered user: AstroCello13-2026
Registered users online: 1
Guests online: 558
Online: tahanson43206
Offline
Like button can go here
===
Today on Mars: 0038/21/25 Wednesday Days of the week OFFSET 2 with Earth. (count from Mars to Earth )
Sol 582 Business Month 21 Third month of Quarter 4 of Year 38
Today on Earth: 2026/07/03 Friday Earth Date)
>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: 38 Martian Astronomical Interval in 12 interval format: 11 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 330 degrees
===
Solar Longitude: 311.7 Sol Number: 582 Change in degrees is +.6 Julian date is: J0038582
Solar Longitude: 311.1 Sol Number: 581 Change in degrees is +.6 Julian date is: J0038581
Solar Longitude: 310.5 Sol Number: 580 Change in degrees is +.6 Julian date is: J0038580
#3>
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 Perhelion 2026/03/26
===
Distance: Mars >> Sun per theskylive.com: 216,159,825 km [25.4 km/s] Difference is +170591 <= +7108 km/hour at 12.0 on 07/03 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 215,989,234 km [25.4 km/s] Difference is +169817 <= +7076 km/hour at 12.0 on 07/02 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 215,819,417 km [25.4 km/s] Difference is +168736 <= +7031 km/hour at 12.0 on 07/01 (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.
j
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 Taurus
Next ahead: Uranus showed up in the view of Mars. This has to be a rare event. It ** is ** rare. Most Mars years Uranus is out of view.
Uranus is shown at RA 4h 5m 56.8s and Mars is shown at RA 4h 04m 42.6s
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 17 and 18 minutes. Communications delay would be 34+ minutes round trip.
=== Time estimate will change below 306 megaKm
Earth Distance in km: 2026/07/03 313,998,066 (decreasing)
Earth Distance in km: 2026/07/02 314,453,274 (decreasing)
Earth Distance in km: 2026/07/01 314,904,462 (decreasing)
6<#
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 It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022. Per earthsky.org, the date is December 8, 2022.
This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/
===
Sol 582 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 582 is Wednesday in the Proposed Business calendar for Mars. Sol 558 Skip Day on Mars. Next is near 558+37 of Year 38 595
##
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 21 of 24: <<== Third month of Quarter 4
Offline
Like button can go here
Place holder for today's Calendar update:
[51.4792N, 0.0000E] 07/04/2026, 13:00:06 Europe/London
Object: Mars [open sky map]
RA 04h 08m 24.2s Dec +20° 41' 54.2" Appar J2000
Mag: 1.35 (Estimated: JPL) Const: Taurus
Current ID 240086
Total number of registered users: 19,630
Total number of topics: 9,059
Total number of posts: 235,768
Newest registered user: AstroCello13-2026
Registered users online: 1
Guests online: 111
Online: tahanson43206
Offline
Like button can go here
===
Today on Mars: 0038/21/26 /Thursday Days of the week OFFSET 2 with Earth. (count from Mars to Earth )
Sol 583 Business Month 21 Third month of Quarter 4 of Year 38
Today on Earth: 2026/07/04 Saturday Earth Date)
>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: 38 Martian Astronomical Interval in 12 interval format: 11 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 330 degrees
===
Solar Longitude: 312.3 Sol Number: 583 Change in degrees is +.6 Julian date is: J0038583
Solar Longitude: 311.7 Sol Number: 582 Change in degrees is +.6 Julian date is: J0038582
Solar Longitude: 311.1 Sol Number: 581 Change in degrees is +.6 Julian date is: J0038581
#3>
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 Perhelion 2026/03/26
===
Distance: Mars >> Sun per theskylive.com: 216,331,494 km [25.4 km/s] Difference is +171669 <= +7153 km/hour at 12.0 on 07/04 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 216,159,825 km [25.4 km/s] Difference is +170591 <= +7108 km/hour at 12.0 on 07/03 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 215,989,234 km [25.4 km/s] Difference is +169817 <= +7076 km/hour at 12.0 on 07/02 (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.
j
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 Taurus
Next ahead: Uranus is past Mars at 16:39 UTC RA 4h 6m 6.6s while Mars shows: RA 4h 7m 18.1s
Uranus showed up in the view of Mars. This has to be a rare event. It ** is ** rare. Most Mars years Uranus is out of view.
Uranus is shown at RA 4h 5m 56.8s and Mars is shown at RA 4h 04m 42.6s
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 17 and 18 minutes. Communications delay would be 34+ minutes round trip.
=== Time estimate will change below 306 megaKm
Earth Distance in km: 2026/07/04 313,537,890 (decreasing)
Earth Distance in km: 2026/07/03 313,998,066 (decreasing)
Earth Distance in km: 2026/07/02 314,453,274 (decreasing)
6<#
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 It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022. Per earthsky.org, the date is December 8, 2022.
This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/
===
Sol 583 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 583 is Thursday in the Proposed Business calendar for Mars. Sol 558 Skip Day on Mars. Next is near 558+37 of Year 38 595
##
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 21 of 24: <<== Third month of Quarter 4
Offline
Like button can go here
Place holder for today's Calendar update:
[51.4792N, 0.0000E] 07/05/2026, 13:00:00 Europe/London
Object: Mars [open sky map]
RA 04h 11m 21.9s Dec +20° 50' 24.9" Appar J2000
Mag: 1.34 (Estimated: JPL) Const: Taurus
Current ID: 240101
otal number of registered users: 19,630
Total number of topics: 9,061
Total number of posts: 235,790
User information
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Registered users online: 2
Guests online: 141
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===
Today on Mars: 0038/21/27 Friday Days of the week OFFSET 2 with Earth. (count from Mars to Earth )
Sol 584 Business Month 21 Third month of Quarter 4 of Year 38
Today on Earth: 2026/07/05 Sunday Earth Date)
>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: 38 Martian Astronomical Interval in 12 interval format: 11 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 330 degrees
===
Solar Longitude: 312.9 Sol Number: 584 Change in degrees is +.6 Julian date is: J0038584
Solar Longitude: 312.3 Sol Number: 583 Change in degrees is +.6 Julian date is: J0038583
Solar Longitude: 311.7 Sol Number: 582 Change in degrees is +.6 Julian date is: J0038582
#3>
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 Perhelion 2026/03/26
===
Distance: Mars >> Sun per theskylive.com: 216,504,081 km [25.4 km/s] Difference is +172587 <= +7191 km/hour at 12.0 on 07/05 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 216,331,494 km [25.4 km/s] Difference is +171669 <= +7153 km/hour at 12.0 on 07/04 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 216,159,825 km [25.4 km/s] Difference is +170591 <= +7108 km/hour at 12.0 on 07/03 (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.
j
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 Taurus
Next ahead: Star above path: TYC 1263-993-1 RA 4h 11m 34.0s
Uranus is out 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 17 and 18 minutes. Communications delay would be 34+ minutes round trip.
=== Time estimate will change below 306 megaKm
Earth Distance in km: 2026/07/05 313,073,034 (decreasing)
Earth Distance in km: 2026/07/04 313,537,890 (decreasing)
Earth Distance in km: 2026/07/03 313,998,066 (decreasing)
6<#
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 It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022. Per earthsky.org, the date is December 8, 2022.
This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/
===
Sol 584 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 584 is Friday in the Proposed Business calendar for Mars. Sol 558 Skip Day on Mars. Next is near 558+37 of Year 38 595
##
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 21 of 24: <<== Third month of Quarter 4
Offline
Like button can go here
Place holder for today's Calendar update:
Current ID 240121
[51.4792N, 0.0000E] 07/06/2026, 13:00:04 Europe/London
Object: Mars [open sky map]
RA 04h 14m 19.5s Dec +20° 58' 43.1" Appar J2000
Mag: 1.33 (Estimated: JPL) Const: Taurus
Total number of registered users: 19,630
Total number of topics: 9,063
Total number of posts: 235,803
Newest registered user: Redfoot-2026
Registered users online: 1
Guests online: 171
Online: tahanson43206
Offline
Like button can go here
===
Today on Mars: 0038/21/28 Saturday Days of the week OFFSET 2 with Earth. (count from Mars to Earth )
Sol 585 Business Month 21 Third month of Quarter 4 of Year 38
Today on Earth: 2026/07/06 Monday Earth Date)
>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: 38 Martian Astronomical Interval in 12 interval format: 11 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 330 degrees
===
Solar Longitude: 313.4 Sol Number: 585 Change in degrees is +.5 Julian date is: J0038585
Solar Longitude: 312.9 Sol Number: 584 Change in degrees is +.6 Julian date is: J0038584
Solar Longitude: 312.3 Sol Number: 583 Change in degrees is +.6 Julian date is: J0038583
#4>
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 Perhelion 2026/03/26
===
Distance: Mars >> Sun per theskylive.com: 216,677,609 km [25.4 km/s] Difference is +173528 <= +7230 km/hour at 12.0 on 07/06 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 216,504,081 km [25.4 km/s] Difference is +172587 <= +7191 km/hour at 12.0 on 07/05 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 216,331,494 km [25.4 km/s] Difference is +171669 <= +7153 km/hour at 12.0 on 07/04 (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.
j
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 Taurus
Next ahead: Star above 9 hours marker TYC 1263-1220-1 RA 4h 13m 57.2s
Star above path: TYC 1263-993-1 RA 4h 11m 34.0s Day 2 past 9 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 17 and 18 minutes. Communications delay would be 34+ minutes round trip.
=== Time estimate will change below 306 megaKm
Earth Distance in km: 2026/07/06 312,603,282 (decreasing)
Earth Distance in km: 2026/07/05 313,073,034 (decreasing)
Earth Distance in km: 2026/07/04 313,537,890 (decreasing)
6<#
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 It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022. Per earthsky.org, the date is December 8, 2022.
This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/
===
Sol 585 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 585 is Saturday in the Proposed Business calendar for Mars. Sol 558 Skip Day on Mars. Next is near 558+37 of Year 38 595
##
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 21 of 24: <<== Third month of Quarter 4
Offline
Like button can go here
Place holder for today's Calendar update:
[51.4792N, 0.0000E] 07/07/2026, 13:00:00 Europe/London
Object: Mars [open sky map]
RA 04h 17m 17.7s Dec +21° 06' 49.6" Appar J2000
Mag: 1.33 (Estimated: JPL) Const: Taurus
Current ID: 240139
Total number of registered users: 19,630
Total number of topics: 9,063
Total number of posts: 235,823
Newest registered user: Redfoot-2026
Registered users online: 2
Guests online: 151
Online: tahanson43206, Void
Offline
Like button can go here
===
Today on Mars: 0038/22/01 Sunday Days of the week OFFSET 2 with Earth. (count from Mars to Earth )
Sol 586 Business Month 22 Fourth month of Quarter 4 of Year 38
Today on Earth: 2026/07/07 Tuesday Earth Date)
>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: 38 Martian Astronomical Interval in 12 interval format: 11 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 330 degrees
===
Solar Longitude: 314.0 Sol Number: 586 Change in degrees is +.6 Julian date is: J0038586
Solar Longitude: 313.4 Sol Number: 585 Change in degrees is +.5 Julian date is: J0038585
Solar Longitude: 312.9 Sol Number: 584 Change in degrees is +.6 Julian date is: J0038584
#4>
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 Perhelion 2026/03/26
===
Distance: Mars >> Sun per theskylive.com: 216,852,022 km [25.3 km/s] Difference is +174413 <= +7267 km/hour at 12.0 on 07/07 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 216,677,609 km [25.4 km/s] Difference is +173528 <= +7230 km/hour at 12.0 on 07/06 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 216,504,081 km [25.4 km/s] Difference is +172587 <= +7191 km/hour at 12.0 on 07/05 (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.
j
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 Taurus
Next ahead: Star just above path and well ahead TYC 1276-122-1 RA 4h 18m 07.6s
Star above 9 hours marker TYC 1263-1220-1 RA 4h 13m 57.2s Day 2 <out 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 17 and 18 minutes. Communications delay would be 34+ minutes round trip.
=== Time estimate will change below 306 megaKm
Earth Distance in km: 2026/07/07 312,128,642 (decreasing)
Earth Distance in km: 2026/07/06 312,603,282 (decreasing)
Earth Distance in km: 2026/07/05 313,073,034 (decreasing)
6<#
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 586 is in Month 22 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 22 extends from Sol 586 through 613. <<== There are 28 days in Month 22. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 586 is Sunday in the Proposed Business calendar for Mars. Sol 558 Skip Day on Mars. Next is near 558+37 of Year 38 595
##
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 22 of 24: <<== Fourth month of Quarter 4
Offline
Like button can go here
Place holder for today's Calendar update:
[51.4792N, 0.0000E] 07/08/2026, 13:00:02 Europe/London
Object: Mars [open sky map]
RA 04h 20m 15.4s Dec +21° 14' 43.9" Appar J2000
Mag: 1.33 (Estimated: JPL) Const: Taurus
Current ID 240159
Total number of registered users: 19,630
Total number of topics: 9,063
Total number of posts: 235,841
Newest registered user: Redfoot-2026
Registered users online: 1
Guests online: 148
Online: tahanson43206
Offline
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===
Today on Mars: 0038/22/02 Monday Days of the week OFFSET 2 with Earth. (count from Mars to Earth )
Sol 587 Business Month 22 Fourth month of Quarter 4 of Year 38
Today on Earth: 2026/07/08 Wednesday Earth Date)
>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: 38 Martian Astronomical Interval in 12 interval format: 11 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 330 degrees
===
Solar Longitude: 314.6 Sol Number: 587 Change in degrees is +.6 Julian date is: J0038587
Solar Longitude: 314.0 Sol Number: 586 Change in degrees is +.6 Julian date is: J0038586
Solar Longitude: 313.4 Sol Number: 585 Change in degrees is +.5 Julian date is: J0038585
#4>
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 Perhelion 2026/03/26
===
Distance: Mars >> Sun per theskylive.com: 217,027,329 km [25.3 km/s] Difference is +175307 <= +7304 km/hour at 12.0 on 07/08 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 216,852,022 km [25.3 km/s] Difference is +174413 <= +7267 km/hour at 12.0 on 07/07 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 216,677,609 km [25.4 km/s] Difference is +173528 <= +7230 km/hour at 12.0 on 07/06 (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.
j
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 Taurus
Next ahead: Note Boomer in the view: HIP 20171 plus star below path: TYC 1276-325-1 RA 4h 20m 48.1s
Star just above path and well ahead TYC 1276-122-1 RA 4h 18m 07.6s Day 2 above 9 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 17 and 18 minutes. Communications delay would be 34+ minutes round trip.
=== Time estimate will change below 306 megaKm
Earth Distance in km: 2026/07/08 311,648,937 (decreasing)
Earth Distance in km: 2026/07/07 312,128,642 (decreasing)
Earth Distance in km: 2026/07/06 312,603,282 (decreasing)
6<#
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 587 is in Month 22 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 22 extends from Sol 586 through 613. <<== There are 28 days in Month 22. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 587 is Monday in the Proposed Business calendar for Mars. Sol 558 Skip Day on Mars. Next is near 558+37 of Year 38 595
##
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 22 of 24: <<== Fourth month of Quarter 4
Offline
Like button can go here
Place holder for today's Calendar update
[51.4792N, 0.0000E] 07/09/2026, 13:00:03 Europe/London
Object: Mars [open sky map]
RA 04h 23m 13.0s Dec +21° 22' 25.7" Appar J2000
Mag: 1.32 (Estimated: JPL) Const: Taurus
Current ID: 240182
Offline
Like button can go here
===
Today on Mars: 0038/22/03 Tuesday Days of the week OFFSET 2 with Earth. (count from Mars to Earth )
Sol 588 Business Month 22 Fourth month of Quarter 4 of Year 38
Today on Earth: 2026/07/09 Wednesday Earth Date)
>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: 38 Martian Astronomical Interval in 12 interval format: 11 <<== The Astronomical interval
Check Longitude: the interval will increment when longitude reaches 330 degrees
===
Solar Longitude: 315.2 Sol Number: 588 Change in degrees is +.6 Julian date is: J0038588
Solar Longitude: 314.6 Sol Number: 587 Change in degrees is +.6 Julian date is: J0038587
Solar Longitude: 314.0 Sol Number: 586 Change in degrees is +.6 Julian date is: J0038586
#4>
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 Perhelion 2026/03/26
===
Distance: Mars >> Sun per theskylive.com: 217,203,497 km [25.3 km/s] Difference is +176168 <= +7340 km/hour at 12.0 on 07/09 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 217,027,329 km [25.3 km/s] Difference is +175307 <= +7304 km/hour at 12.0 on 07/08 (time 12:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com: 216,852,022 km [25.3 km/s] Difference is +174413 <= +7267 km/hour at 12.0 on 07/07 (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.
j
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 Taurus
Next ahead: HIP 20480 right at 9 hours marker RA 4h 23m 22.3s
Note Boomer in the view: HIP 20171 plus star below path: TYC 1276-325-1 RA 4h 20m 48.1s Day 2 TYC is past 9 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 17 and 18 minutes. Communications delay would be 34+ minutes round trip.
=== Time estimate will change below 306 megaKm
Earth Distance in km: 2026/07/09 311,164,111 (decreasing)
Earth Distance in km: 2026/07/08 311,648,937 (decreasing)
Earth Distance in km: 2026/07/07 312,128,642 (decreasing)
6<#
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 588 is in Month 22 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 22 extends from Sol 586 through 613. <<== There are 28 days in Month 22. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 588 is Tuesday in the Proposed Business calendar for Mars. Sol 558 Skip Day on Mars. Next is near 558+37 of Year 38 595
##
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 22 of 24: <<== Fourth month of Quarter 4
Offline
Like button can go here