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#2226 2024-06-13 21:41:18

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

===
Today on Mars: 0037/19/20 Friday Days of the week offset 0 with Earth.  (count from Mars to Earth (updated 2024/05/14))
One day note: This is a Skip Day on Mars.  Week days are back in alignmentoffsetzero
Today on Earth: 2024/06/14 Friday (Earth Date) Post Title: Today on Mars   [Aphelion occurred May 30, 2023 Earth Calendar]
====*=

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

Martian Year: 37  Martian Astronomical Month in 12 month format: 10 <<== The Astronomical month will increment when longitude reaches 300 degrees

===
Solar Longitude: 274.1 Sol Number: 521  Change in degrees is +.6 Julian date is: J0037521 << skipdayonmars
Solar Longitude: 273.5 Sol Number: 521  Change in degrees is +.6 Julian date is: J0037521
Solar Longitude: 272.9 Sol Number: 520  Change in degrees is +.6 Julian date is: J0037520
<<#

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 data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 – Earth Date 2024/05/08 Next: (estimated) 2026/03/06
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per 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.

===
Distance: Mars >> Sun per theskylive.com:   208,130,120 km [26.3 km/s] Difference is +76581 <= +3191 km/hour at 08.0 on 06/14 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   208,053,539 km [26.3 km/s] Difference is +74603 <= +3108 km/hour at 08.0 on 06/13 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   207,978,936 km [26.3 km/s] Difference is +72615 <= +3026 km/hour at 08.0 on 06/12 (time 8:00) (24.0 hours)
==*==*==*

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 progressing from lower right to upper left in the view from Earth. Slant 20 degrees.
Next up: Star just above path: TYC 633-341-1 RA 02h 08m 46.9s – Day 0 -
TYC 633-725-1 RA 02h 05m 36.1s – Day 0 – Day 1 still visible in extreme lower right corner … last moments for 725
====*====*>>>

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.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading left at a downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

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

===
Earth Distance 2024/06/14 270,145,000 (decreasing)
Earth Distance 2024/06/13 270,758,000 (decreasing)
Earth Distance 2024/06/12 271,241,000 (decreasing)
#>

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

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun)
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 this cycle. 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.

Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
According to www.hercampus.com, Retrograde movement began October 30, 2022.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

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 521 is in Month 19 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  19 extends from Sol 502 through 529. <<== There are 28 days in Month 19. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 521 is Friday  in the Proposed Business calendar for Mars.   Sol 521 was a Skip Day on Mars. Next is near 558 July 18th
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
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

Month 19 of 24: <<== First month of Quarter 4

Offline

#2227 2024-06-14 20:28:49

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

===
Today on Mars: 0037/19/21 Saturday Days of the week offset 0 with Earth.  (count from Mars to Earth (updated 2024/05/14))

Today on Earth: 2024/06/15 Saturday Earth Date) Post Title: Today on Mars   [Aphelion occurred May 30, 2023 Earth Calendar]
====*=

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

Martian Year: 37  Martian Astronomical Month in 12 month format: 10 <<== The Astronomical month will increment when longitude reaches 300 degrees

===
Solar Longitude: 274.8 Sol Number: 522  Change in degrees is +.7 Julian date is: J0037522
Solar Longitude: 274.1 Sol Number: 521  Change in degrees is +.6 Julian date is: J0037521 << skipdayonmars
Solar Longitude: 273.5 Sol Number: 521  Change in degrees is +.6 Julian date is: J0037521
<<#

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 data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 – Earth Date 2024/05/08 Next: (estimated) 2026/03/06
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per 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.

===
Distance: Mars >> Sun per theskylive.com:   208,208,639 km [26.3 km/s] Difference is +78519 <= +3272 km/hour at 08.0 on 06/15 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   208,130,120 km [26.3 km/s] Difference is +76581 <= +3191 km/hour at 08.0 on 06/14 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   208,053,539 km [26.3 km/s] Difference is +74603 <= +3108 km/hour at 08.0 on 06/13 (time 8:00) (24.0 hours)
==*==*==*

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 progressing from lower right to upper left in the view from Earth. Slant 20 degrees.
Next up: Galaxy just below path and ahead of 9 hours marker: PGC 1403269 – RA 02h 11m 33.9s – Day 0
TYC 633-341-1 RA 02h 08m 46.9s – Day 0 – Day 1 above 9 hours past marker
====*====*>>>

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.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading left at a downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

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

===
Earth Distance 2024/06/15 269,568,000 (decreasing)
Earth Distance 2024/06/14 270,145,000 (decreasing)
Earth Distance 2024/06/13 270,758,000 (decreasing)
#>

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

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun)
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 this cycle. 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.

Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
According to www.hercampus.com, Retrograde movement began October 30, 2022.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

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 522 is in Month 19 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  19 extends from Sol 502 through 529. <<== There are 28 days in Month 19. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 522 is Saturday  in the Proposed Business calendar for Mars.   Sol 521 was a Skip Day on Mars. Next is near 558 July 18th
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
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

Month 19 of 24: <<== First month of Quarter 4

Offline

#2228 2024-06-15 18:26:26

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

===
Today on Mars: 0037/19/22 Sunday Days of the week offset 0 with Earth.  (count from Mars to Earth (updated 2024/05/14))

Today on Earth: 2024/06/16 Sunday Earth Date) Post Title: Today on Mars   [Aphelion occurred May 30, 2023 Earth Calendar]
====*=

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

Martian Year: 37  Martian Astronomical Month in 12 month format: 10 <<== The Astronomical month will increment when longitude reaches 300 degrees

===
Solar Longitude: 275.4 Sol Number: 523  Change in degrees is +.6 Julian date is: J0037523
Solar Longitude: 274.8 Sol Number: 522  Change in degrees is +.7 Julian date is: J0037522
Solar Longitude: 274.1 Sol Number: 521  Change in degrees is +.6 Julian date is: J0037521 << skipdayonmars
<<#

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 data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 – Earth Date 2024/05/08 Next: (estimated) 2026/03/06
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per 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.

===
Distance: Mars >> Sun per theskylive.com:   208,289,115 km [26.3 km/s] Difference is +80476 <= +3353 km/hour at 08.0 on 06/16 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   208,208,639 km [26.3 km/s] Difference is +78519 <= +3272 km/hour at 08.0 on 06/15 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   208,130,120 km [26.3 km/s] Difference is +76581 <= +3191 km/hour at 08.0 on 06/14 (time 8:00) (24.0 hours)
==*==*==*

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 progressing from lower right to upper left in the view from Earth. Slant 20 degrees.
Next up: Mini-Boomer HIP 10415 below path: RA 02h 14m 12.6s – Day 0 -
PGC 1403269 – RA 02h 11m 33.9s – Day 0  Day 1 – Below 9 hours past marker … last hours for 269
====*====*>>>

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.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading left at a downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

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

===
Earth Distance 2024/06/16 268,989,778 (decreasing)
Earth Distance 2024/06/15 269,568,000 (decreasing)
Earth Distance 2024/06/14 270,145,000 (decreasing)
#>

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

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun)
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 this cycle. 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.

Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
According to www.hercampus.com, Retrograde movement began October 30, 2022.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

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 523 is in Month 19 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  19 extends from Sol 502 through 529. <<== There are 28 days in Month 19. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 523 is Sunday  in the Proposed Business calendar for Mars.   Sol 521 was a Skip Day on Mars. Next is near 558 July 18th
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
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

Month 19 of 24: <<== First month of Quarter 4

Offline

#2229 2024-06-16 20:59:48

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

===
Today on Mars: 0037/19/23 Monday Days of the week offset 0 with Earth.  (count from Mars to Earth (updated 2024/05/14))

Today on Earth: 2024/06/17 Monday Earth Date) Post Title: Today on Mars   [Aphelion occurred May 30, 2023 Earth Calendar]
====*=

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

Martian Year: 37  Martian Astronomical Month in 12 month format: 10 <<== The Astronomical month will increment when longitude reaches 300 degrees

===
Solar Longitude: 276.0 Sol Number: 524  Change in degrees is +.6 Julian date is: J0037524
Solar Longitude: 275.4 Sol Number: 523  Change in degrees is +.6 Julian date is: J0037523
Solar Longitude: 274.8 Sol Number: 522  Change in degrees is +.7 Julian date is: J0037522
<<#

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 data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 – Earth Date 2024/05/08 Next: (estimated) 2026/03/06
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per 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.

===
Distance: Mars >> Sun per theskylive.com:   208,371,541 km [26.3 km/s] Difference is +82426 <= +3434 km/hour at 08.0 on 06/17 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   208,289,115 km [26.3 km/s] Difference is +80476 <= +3353 km/hour at 08.0 on 06/16 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   208,208,639 km [26.3 km/s] Difference is +78519 <= +3272 km/hour at 08.0 on 06/15 (time 8:00) (24.0 hours)
==*==*==*

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 progressing from lower right to upper left in the view from Earth. Slant 20 degrees.
Next up: Star in path TYC 637-1130-1 RA 02h 17m 31.3s – Day 0 -
HIP 10415 below path: RA 02h 14m 12.6s – Day 0 – Day 1 at extreme lower right --- last minutes for 415
====*====*>>>

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.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading left at a downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

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

===
Earth Distance 2024/06/17 268,340,000 (decreasing)
Earth Distance 2024/06/16 268,989,778 (decreasing)
Earth Distance 2024/06/15 269,568,000 (decreasing)
#>

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

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun)
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 this cycle. 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.

Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
According to www.hercampus.com, Retrograde movement began October 30, 2022.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

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 524 is in Month 19 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  19 extends from Sol 502 through 529. <<== There are 28 days in Month 19. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 524 is Monday  in the Proposed Business calendar for Mars.   Sol 521 was a Skip Day on Mars. Next is near 558 July 18th
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
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

Month 19 of 24: <<== First month of Quarter 4

Offline

#2230 2024-06-17 18:39:53

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

===
Today on Mars: 0037/19/24 Tuesday Days of the week offset 0 with Earth.  (count from Mars to Earth (updated 2024/05/14))

Today on Earth: 2024/06/18 Tuesday Earth Date) Post Title: Today on Mars   [Aphelion occurred May 30, 2023 Earth Calendar]
====*=

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

Martian Year: 37  Martian Astronomical Month in 12 month format: 10 <<== The Astronomical month will increment when longitude reaches 300 degrees

===
Solar Longitude: 276.6 Sol Number: 525  Change in degrees is +.6 Julian date is: J0037525
Solar Longitude: 276.0 Sol Number: 524  Change in degrees is +.6 Julian date is: J0037524
Solar Longitude: 275.4 Sol Number: 523  Change in degrees is +.6 Julian date is: J0037523
<<#

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 data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 – Earth Date 2024/05/08 Next: (estimated) 2026/03/06
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per 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.

===
Distance: Mars >> Sun per theskylive.com:   208,455,859 km [26.3 km/s] Difference is +84318 <= +3513 km/hour at 08.0 on 06/18 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   208,371,541 km [26.3 km/s] Difference is +82426 <= +3434 km/hour at 08.0 on 06/17 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   208,289,115 km [26.3 km/s] Difference is +80476 <= +3353 km/hour at 08.0 on 06/16 (time 8:00) (24.0 hours)
==*==*==*

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 progressing from lower right to upper left in the view from Earth. Slant 20 degrees.
Next up: Star above path at far left TYC 637-148-1 RA 02h 20m 16.6s – Day 0 -
TYC 637-1130-1 RA 02h 17m 31.3s – Day 0 – Day 1 between 4.5 and 9 hour markers – last day for 1130
====*====*>>>

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.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading left at a downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

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

===
Earth Distance 2024/06/18 267,789,000 (decreasing)
Earth Distance 2024/06/17 268,340,000 (decreasing)
Earth Distance 2024/06/16 268,989,778 (decreasing)
#>

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

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun)
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 this cycle. 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.

Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
According to www.hercampus.com, Retrograde movement began October 30, 2022.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

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 525 is in Month 19 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  19 extends from Sol 502 through 529. <<== There are 28 days in Month 19. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 525 is Tuesday  in the Proposed Business calendar for Mars.   Sol 521 was a Skip Day on Mars. Next is near 558 July 18th
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
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

Month 19 of 24: <<== First month of Quarter 4

Offline

#2231 2024-06-18 19:50:01

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

208,542,108 km [26.3 km/s]
Place holder for daily Calendar update
(th)

Offline

#2232 2024-06-20 06:02:37

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

208,630,258 km [26.3 km/s]
Place holder for daily calendar update

Offline

#2233 2024-06-20 16:55:10

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 29,312

Re: Martian Calender - I have created a martian calender...

I see that you are thinking of this as 1 of the first few projects.
"Mars Business Calendar as a Profit Center for the Mars Society by tahanson43206"

List of attributes for each day of a Mars and Earth combination calendar.
Julian like counts for each comes to mind making math easy.
List holidays to observe for each.
Pretty pictures of both places to remind for seasons.

I am sure you will think of many more features to include.

Offline

#2234 2024-06-20 18:18:10

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

For SpaceNut re #2233

Thank you for your encouraging post!  The calendar is a joint endeavor, with your leadership, a crucial suggestion by RobertDyck and I've been happy to do the grunt work to show that the proposed Business Calendar for Mars not only makes sense, but it is superior to the Earth calendar in a number of ways.

You may have noticed that I've had to limit my time invested to the little placeholder for the past couple of days. The demands on my time and energy outside of newMars are high right now.  I've noticed that most of our members take vacations every now and then.  I'm trying to keep the place holders because they only take a couple of minutes. The full Calendar post takes about half an hour on average.

The recruiting post is absent entirely when I can't allocate the time needed.

Hopefully things will settle down in a week or so.

(th)

Offline

#2235 2024-06-21 06:36:27

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

208,720,295 km [26.3 km/s]

Place holder for daily Calendar update.
(th)

Offline

#2236 2024-06-22 06:03:08

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

===
Today on Mars: 0037/19/28 Saturday Days of the week offset 0 with Earth.  (count from Mars to Earth (updated 2024/05/14))
One day note: Last Sol of Month 19
Today on Earth: 2024/06/22 Saturday Earth Date) Post Title: Today on Mars   [Aphelion occurred May 30, 2023 Earth Calendar]
====*=

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

Martian Year: 37  Martian Astronomical Month in 12 month format: 10 <<== The Astronomical month will increment when longitude reaches 300 degrees

===
Solar Longitude: 279.1 Sol Number: 529  Change in degrees is +.6 Julian date is: J0037529
Solar Longitude: 278.5 Sol Number: 528  Change in degrees is +.6 Julian date is: J0037528
Solar Longitude: 277.9 Sol Number: 527  Change in degrees is +.6 Julian date is: J0037527
<<#

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 data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 – Earth Date 2024/05/08 Next: (estimated) 2026/03/06
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per 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.

===
Distance: Mars >> Sun per theskylive.com:   298,812,221 km [26.2 km/s] Difference is +91926 <= +3830 km/hour at 08.0 on 06/22 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   208,542,108 km [26.3 km/s] Difference is +86249 <= +3594 km/hour at 08.0 on 06/19 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   208,455,859 km [26.3 km/s] Difference is +84318 <= +3513 km/hour at 08.0 on 06/18 (time 8:00) (24.0 hours)
==*==*==*

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 progressing from lower right to upper left in the view from Earth. Slant 20 degrees.
Next up: Star in path at far left: TYC 638-253-1 02h 32m 44.1s – Day 0 -
====*====*>>>

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.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading left at a downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

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

===
Earth Distance 2024/06/22 265,210,000 (decreasing)
Earth Distance 2024/06/19 266,913,000 (decreasing)
Earth Distance 2024/06/18 267,789,000 (decreasing)
#>

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

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun)
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 this cycle. 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.

Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
According to www.hercampus.com, Retrograde movement began October 30, 2022.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

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 529 is in Month 19 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  19 extends from Sol 502 through 529. <<== There are 28 days in Month 19. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 529 is Saturday  in the Proposed Business calendar for Mars.   Sol 521 was a Skip Day on Mars. Next is near 558 July 18th
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
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

Month 19 of 24: <<== First month of Quarter 4

Offline

#2237 2024-06-22 22:07:51

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

===
Today on Mars: 0037/20/01 Sunday Days of the week offset 0 with Earth.  (count from Mars to Earth (updated 2024/05/14))
One day note: first Sol of Month 20
Today on Earth: 2024/06/23 Sunday Earth Date) Post Title: Today on Mars   [Aphelion occurred May 30, 2023 Earth Calendar]
====*=

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

Martian Year: 37  Martian Astronomical Month in 12 month format: 10 <<== The Astronomical month will increment when longitude reaches 300 degrees

===
Solar Longitude: 279.7 Sol Number: 530  Change in degrees is +.6 Julian date is: J0037530
Solar Longitude: 279.1 Sol Number: 529  Change in degrees is +.6 Julian date is: J0037529
Solar Longitude: 278.5 Sol Number: 528  Change in degrees is +.6 Julian date is: J0037528
<<#

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 data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 – Earth Date 2024/05/08 Next: (estimated) 2026/03/06
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per 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.

===
Distance: Mars >> Sun per theskylive.com:   208,905,994 km [26.2 km/s] Difference is +93773 <= +3907 km/hour at 08.0 on 06/23 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   208,812,221 km [26.2 km/s] Difference is +91926 <= +3830 km/hour at 08.0 on 06/22 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   208,542,108 km [26.3 km/s] Difference is +86249 <= +3594 km/hour at 08.0 on 06/19 (time 8:00) (24.0 hours)
==*==*==*

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 progressing from lower right to upper left in the view from Earth. Slant 20 degrees.
Next up: Star above path: TYC 645-271-1 RA 02h 33m 43.5s – Day 0 -
TYC 638-253-1 02h 32m 44.1s – Day 0 – Day 1 just ahead of Mars – Possible last day for 253
====*====*>>>

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.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading left at a downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

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

===
Earth Distance 2024/06/23 264,759,000 (decreasing)
Earth Distance 2024/06/22 265,210,000 (decreasing)
Earth Distance 2024/06/19 266,913,000 (decreasing)
#>

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

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun)
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 this cycle. 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.

Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
According to www.hercampus.com, Retrograde movement began October 30, 2022.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

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 530 is in Month 20 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  20 extends from Sol 530 through 557. <<== There are 28 days in Month 20. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 530 is Sunday  in the Proposed Business calendar for Mars.   Sol 521 was a Skip Day on Mars. Next is near 558 July 18th
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
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

Month 20 of 24: <<== Second month of Quarter 4

Offline

#2238 2024-06-24 06:02:05

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

209,001,655 km [26.2 km/s]

Place holder for daily Calendar

2024/06/24 8 AM EST

Updating from new location.

Offline

#2239 2024-06-25 06:06:07

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

209,099,343 km [26.2 km/s]

Place holder for today's Calendar update

2024/06/25 8:02 AM EST

Offline

#2240 2024-06-26 05:35:21

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

Place holder for today's Calendar update.

209,198,519 km [26.2 km/s]

2024/06/26 8:01 AM EST

(th)

Offline

#2241 2024-06-26 18:10:18

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

Place holder for the daily Calendar update.

209,299,534 km [26.2 km/s]

8 AM EST 2024/06/27

(th)

Offline

#2242 2024-06-28 06:04:05

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

Place holder for today's Calendar update.

209,402,581 km [26.2 km/s] << taken at 8 AM EST

Friday 2024/06/28

209,421,586 km [26.2 km/s] << taken at 12:25 PM EST

Earth distance: 261,572,887 km [38.9 km/s]


Martian Year:   
37
Martian Month:   
10
Solar longitude Ls:   
282.8
Sol number:   
535

Approximately six days have passed since the last full post of this Calendar on June 23rd.

The post of June 29 appears to be complete, but it had to be assembled by using two computers. 

The Internet enviroment has changed from wired service to WiFi service, and the systems involved are not yet full adapted.

(th)

Offline

#2243 2024-06-29 06:05:51

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

209,507,122 km [26.2 km/s]

Place holder for today's Calendar update

Earth distance: 261,061,327 km [38.7 km/s]


Martian Year:   
37
Martian Month:   
10
Solar longitude Ls:   
283.5
Sol number:   
536

Offline

#2244 2024-06-29 07:14:28

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

===
Today on Mars: 0037/20/06 Saturday Days of the week offset 0 with Earth.  (count from Mars to Earth (updated 2024/05/14))

Today on Earth: 2024/06/29 Saturday Earth Date) Post Title: Today on Mars   [Aphelion occurred May 30, 2023 Earth Calendar]
====*=

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

Martian Year: 37  Martian Astronomical Month in 12 month format: 10 <<== The Astronomical month will increment when longitude reaches 300 degrees

===
Solar Longitude: 283.5 Sol Number: 536  Change in degrees is +.? Julian date is: J0037536
Gap
Solar Longitude: 279.7 Sol Number: 530  Change in degrees is +.6 Julian date is: J0037530
Solar Longitude: 279.1 Sol Number: 529  Change in degrees is +.6 Julian date is: J0037529
<<#

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 data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 – Earth Date 2024/05/08 Next: (estimated) 2026/03/06
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per 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.

===
Distance: Mars >> Sun per theskylive.com:   209,507,122 km [26.2 km/s] Difference is +?????? <= +???? km/hour at 08.0 on 06/29 (time 8:00) (24.0 hours)
Gap
Distance: Mars >> Sun per theskylive.com:   208,905,994 km [26.2 km/s] Difference is +93773 <= +3907 km/hour at 08.0 on 06/23 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   208,812,221 km [26.2 km/s] Difference is +91926 <= +3830 km/hour at 08.0 on 06/22 (time 8:00) (24.0 hours)
==*==*==*

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 progressing from lower right to upper left in the view from Earth. Slant 20 degrees.
Next up: Galaxy above path and just past 9 hours marker. PGC 1486658 RA 02h 50m 15.3s – Day 0 -
====*====*>>>

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.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading left at a downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

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

===
Earth Distance 2024/06/29 261,044,000 (decreasing)
Gap
Earth Distance 2024/06/23 264,759,000 (decreasing)
Earth Distance 2024/06/22 265,210,000 (decreasing)
#>

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

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun)
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 this cycle. 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.

Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
According to www.hercampus.com, Retrograde movement began October 30, 2022.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

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 536 is in Month 20 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  20 extends from Sol 530 through 557. <<== There are 28 days in Month 20. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 536 is Saturday  in the Proposed Business calendar for Mars.   Sol 521 was a Skip Day on Mars. Next is near 558 July 18th
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
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

Month 20 of 24: <<== Second month of Quarter 4

Offline

#2245 2024-06-30 06:01:56

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

===
Today on Mars: 0037/20/08 Sunday Days of the week offset 0 with Earth.  (count from Mars to Earth (updated 2024/05/14))

Today on Earth: 2024/06/30 Sunday Earth Date) Post Title: Today on Mars   [Aphelion occurred May 30, 2023 Earth Calendar]
====*=

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

Martian Year: 37  Martian Astronomical Month in 12 month format: 10 <<== The Astronomical month will increment when longitude reaches 300 degrees

===
Solar Longitude: 284.1 Sol Number: 537  Change in degrees is +.6 Julian date is: J0037537
Solar Longitude: 283.5 Sol Number: 536  Change in degrees is +.? Julian date is: J0037536
Gap
Solar Longitude: 279.7 Sol Number: 530  Change in degrees is +.6 Julian date is: J0037530
<<#

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 data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 – Earth Date 2024/05/08 Next: (estimated) 2026/03/06
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per 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.

===
Distance: Mars >> Sun per theskylive.com:   209,613,647 km [26.2 km/s] Difference is +?????? <= +???? km/hour at 08.0 on 06/30 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   209,507,122 km [26.2 km/s] Difference is +?????? <= +???? km/hour at 08.0 on 06/29 (time 8:00) (24.0 hours)
Gap
Distance: Mars >> Sun per theskylive.com:   208,905,994 km [26.2 km/s] Difference is +93773 <= +3907 km/hour at 08.0 on 06/23 (time 8:00) (24.0 hours)
==*==*==*

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 progressing from lower right to upper left in the view from Earth. Slant 20 degrees.
Next up: Star above 4.5 hour marker: TYC 1224-778-1 RA 02h 52m 50.9s – Day 0 -
PGC 1486658 RA 02h 50m 15.3s – Day 0 – Day 1 still visible at far right of view … last hours for 658
====*====*>>>

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.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading left at a downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

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

===
Earth Distance 2024/06/30 260,397,000 (decreasing)
Earth Distance 2024/06/29 261,044,000 (decreasing)
Gap
Earth Distance 2024/06/23 264,759,000 (decreasing)
#>

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

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun)
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 this cycle. 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.

Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
According to www.hercampus.com, Retrograde movement began October 30, 2022.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

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 537 is in Month 20 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  20 extends from Sol 530 through 557. <<== There are 28 days in Month 20. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 537 is Sunday  in the Proposed Business calendar for Mars.   Sol 521 was a Skip Day on Mars. Next is near 558 July 18th
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
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

Month 20 of 24: <<== Second month of Quarter 4

Offline

#2246 2024-07-01 04:59:29

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

Place holder for today's Calendar update

===
Today on Mars: 0037/20/09 Monday Days of the week offset 0 with Earth.  (count from Mars to Earth (updated 2024/05/14))
Today on Earth: 2024/07/01 Monday Earth Date) Post Title: Today on Mars   [Aphelion occurred May 30, 2023 Earth Calendar]
====*=

This reading is taken at 11:00 UTC instead of 12:00
209,717,746 km [26.1 km/s]

Martian Year:   
37
Martian Month:   
10
Solar longitude Ls:   
284.7
Sol number:   
538

Offline

#2247 2024-07-02 06:04:43

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

tahanson43206 wrote:

209,832,249 km [26.1 km/s]

2024/07/02 at 12:00 UTC


Martian Year:   
37
Martian Month:   
10
Solar longitude Ls:   
285.3
Sol number:   
539

Offline

#2248 2024-07-03 06:04:33

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

Place holder for today's Calendar update

209,944,089 km [26.1 km/s]


Martian Year:   
37
Martian Month:   
10
Solar longitude Ls:   
285.9
Sol number:   
540


(th)

Offline

#2249 2024-07-04 06:05:03

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

210,057,347 km [26.1 km/s]

Place holder for today's Calendar update

Time of capture: 12:00:04 UTC


Martian Year:   
37
Martian Month:   
10
Solar longitude Ls:   
286.5
Sol number:   
541

(th)

Offline

#2250 2024-07-04 08:52:25

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 18,178

Re: Martian Calender - I have created a martian calender...

===
Today on Mars: 0037/20/12 Thursday Days of the week offset 0 with Earth.  (count from Mars to Earth (updated 2024/05/14))

Today on Earth: 2024/07/04 Thursday Earth Date) Post Title: Today on Mars   [Aphelion occurred May 30, 2023 Earth Calendar]
====*=

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

Martian Year: 37  Martian Astronomical Month in 12 month format: 10 <<== The Astronomical month will increment when longitude reaches 300 degrees

===
Solar Longitude: 286.5 Sol Number: 541  Change in degrees is +.? Julian date is: J0037541
Gap
Solar Longitude: 284.1 Sol Number: 537  Change in degrees is +.6 Julian date is: J0037537
Solar Longitude: 283.5 Sol Number: 536  Change in degrees is +.? Julian date is: J0037536
<<#

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 data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 – Earth Date 2024/05/08 Next: (estimated) 2026/03/06
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (actual) 2024/05/08
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per 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.

===
Distance: Mars >> Sun per theskylive.com:   210,057,347 km [26.2 km/s] Difference is +?????? <= +???? km/hour at 08.0 on 07/04 (time 8:00) (24.0 hours)
Gap
Distance: Mars >> Sun per theskylive.com:   209,613,647 km [26.2 km/s] Difference is +?????? <= +???? km/hour at 08.0 on 06/30 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   209,507,122 km [26.2 km/s] Difference is +?????? <= +???? km/hour at 08.0 on 06/29 (time 8:00) (24.0 hours)
==*==*==*

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 progressing from lower right to upper left in the view from Earth. Slant 20 degrees.
Next up: Star just above path: TYC 1225-1607-1 RA 03h 06m 05.1s – Day 0 -
====*====*>>>

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.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading left at a downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

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

===
Earth Distance 2024/07/04 257,820,000 (decreasing)
Gap
Earth Distance 2024/06/30 260,397,000 (decreasing)
Earth Distance 2024/06/29 261,044,000 (decreasing)
Gap
Earth Distance 2024/06/23 264,759,000 (decreasing)
#>

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

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun)
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 this cycle. 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.

Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
According to www.hercampus.com, Retrograde movement began October 30, 2022.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

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 541 is in Month 20 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  20 extends from Sol 530 through 557. <<== There are 28 days in Month 20. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 541 is Thursday  in the Proposed Business calendar for Mars.   Sol 521 was a Skip Day on Mars. Next is near 558 July 18th
##

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
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

Month 20 of 24: <<== Second month of Quarter 4

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