New Mars Forums

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

Place holder for today's Calendar update

Snapshot taken at 12:02:12
Greenwich, UK 08/07/2024, 13:02:12 Europe/London
Object: Mars  [ ▸ Sky Map ]
RA 04h 42m 11.5s Dec +21° 43' 53.7" Appar J2000
Mag: 0.90 (Estimated: JPL)  Const: Taurus
Sun Dist: 214,817,768 km [25.6 km/s]
Earth Dist: 234,169,898 km [32.6 km/s]

The snapshot here was taken shortly after 11:00 UTC (11:03:46 to be exact)
Greenwich, UK 08/07/2024, 12:03:46 Europe/London
Object: Mars  [ ▸ Sky Map ]
RA 04h 42m 04.7s Dec +21° 43' 39.0" Appar J2000
Mag: 0.89 (Estimated: JPL)  Const: Taurus
Sun Dist: 214,811,176 km [25.6 km/s]
Earth Dist: 234,200,927 km [32.7 km/s]

Martian Year:   
37
Martian Astronomical Month:   
11
Solar longitude Ls:   
307
Sol number:   
574

(th)

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

===
Today on Mars: 0037/21/17 Tuesday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2024/07/22))

Today on Earth: 2024/08/07 Wednesday 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: 11 <<== The Astronomical month will increment when longitude reaches 330 degrees

===
Solar Longitude: 307.0 Sol Number: 574  Change in degrees is +.6 Julian date is: J0037574
Solar Longitude: 306.4 Sol Number: 573  Change in degrees is +.6 Julian date is: J0037573
Solar Longitude: 305.8 Sol Number: 572  Change in degrees is +.6 Julian date is: J0037572
<<#

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:   214,817,768 km [25.6 km/s] Difference is +162135 <= +6485 km/hour at 08.0 on 08/07 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   214,655,633 km [25.6 km/s] Difference is +169416 <= +6416 km/hour at 08.0 on 08/06 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   214,495,217 km [25.6 km/s] Difference is +159933 <= +6397 km/hour at 08.0 on 08/05 (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 PGC 1658261 RA 04h 42m 49.1s – Day 0 -
PGC 1653789 RA 04h 39m 58.6s – Day 0 – Day 1 just past 10 hours marker … last day for 789
====*====*>>>

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 13 and 14 minutes. Communications delay would be 26+ minutes round trip.

===
Earth Distance: 2024/08/07 233,992,000 (decreasing)
Earth Distance: 2024/08/06 234,874,000 (decreasing)
Earth Distance: 2024/08/05 235,456,000 (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 574 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 574 is Tuesday  in the Proposed Business calendar for Mars.   Sol 558 was a Skip Day on Mars. Next is near 585 August 26
##

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 21 of 24: <<== Third month of Quarter 4

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

Place holder for today's Calendar update

Greenwich, UK 08/08/2024, 13:00:07 Europe/London  << 12:00:07 UTC
Object: Mars  [ ▸ Sky Map ]
RA 04h 45m 00.9s Dec +21° 49' 56.3" Appar J2000
Mag: 0.90 (Estimated: JPL)  Const: Taurus
Sun Dist: 214,980,534 km [25.5 km/s]
Earth Dist: 233,404,216 km [32.5 km/s]

Martian Year:   
37
Martian Month:   
11
Solar longitude Ls:   
307.6
Sol number:   
575

(th)

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

===
Today on Mars: 0037/21/18 Wednesday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2024/07/22))

Today on Earth: 2024/08/08 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: 11 <<== The Astronomical month will increment when longitude reaches 330 degrees

===
Solar Longitude: 307.6 Sol Number: 575  Change in degrees is +.6 Julian date is: J0037575
Solar Longitude: 307.0 Sol Number: 574  Change in degrees is +.6 Julian date is: J0037574
Solar Longitude: 306.4 Sol Number: 573  Change in degrees is +.6 Julian date is: J0037573
<<#

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:   214,980,534 km [25.5 km/s] Difference is +162766 <= +6510 km/hour at 08.0 on 08/08 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   214,817,768 km [25.6 km/s] Difference is +162135 <= +6485 km/hour at 08.0 on 08/07 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   214,655,633 km [25.6 km/s] Difference is +169416 <= +6416 km/hour at 08.0 on 08/06 (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 1279-1121-1 RA 04h 45m 50.4s – Day 0-
PGC 1658261 RA 04h 42m 49.1s – Day 0 – Day 1 above 10 hours 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 13 and 14 minutes. Communications delay would be 26+ minutes round trip.

===
Earth Distance: 2024/08/08 233,269,000 (decreasing)
Earth Distance: 2024/08/07 233,992,000 (decreasing)
Earth Distance: 2024/08/06 234,874,000 (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 575 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 575 is Wednesday  in the Proposed Business calendar for Mars.   Sol 558 was a Skip Day on Mars. Next is near 585 August 26
##

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 21 of 24: <<== Third month of Quarter 4

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

Place holder for today's Calendar update...

Greenwich, UK 08/09/2024, 13:12:04 Europe/London << 12:12:04 UTC (missed the hour change)
Object: Mars  [ ▸ Sky Map ]
RA 04h 47m 51.9s Dec +21° 55' 51.0" Appar J2000
Mag: 0.91 (Estimated: JPL)  Const: Taurus
Sun Dist: 215,145,995 km [25.5 km/s]
Earth Dist: 232,626,690 km [32.3 km/s]

Snapshot at 11:00 UTC
reenwich, UK 08/09/2024, 12:00:01 Europe/London
Object: Mars  [ ▸ Sky Map ]
RA 04h 47m 43.5s Dec +21° 55' 34.0" Appar J2000
Mag: 0.91 (Estimated: JPL)  Const: Taurus
Sun Dist: 215,137,759 km [25.5 km/s]
Earth Dist: 232,665,374 km [32.3 km/s]

Martian Year:   
37
Martian Astronomical Month:   
11
Solar longitude Ls:   
308.2
Sol number:   
576

(th)

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

===
Today on Mars: 0037/21/19 Thursday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2024/07/22))

Today on Earth: 2024/08/09 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: 11 <<== The Astronomical month will increment when longitude reaches 330 degrees

===
Solar Longitude: 308.2 Sol Number: 576  Change in degrees is +.6 Julian date is: J0037576
Solar Longitude: 307.6 Sol Number: 575  Change in degrees is +.6 Julian date is: J0037575
Solar Longitude: 307.0 Sol Number: 574  Change in degrees is +.6 Julian date is: J0037574
<<#

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:   215,145,995 km [25.5 km/s] Difference is +165461 <= +6618 km/hour at 08.2 on 08/08 (time 8:12) (24.2 hours)
Distance: Mars >> Sun per theskylive.com:   214,980,534 km [25.5 km/s] Difference is +162766 <= +6510 km/hour at 08.0 on 08/08 (time 8:00) (24.0 hours)
Distance: Mars >> Sun per theskylive.com:   214,817,768 km [25.6 km/s] Difference is +162135 <= +6485 km/hour at 08.0 on 08/07 (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: Below path HIP 22443 RA 04h 49m 45.9s – Day 0 -
TYC 1279-1121-1 RA 04h 45m 50.4s – Day 0- Day 1 out of view when checked late in the day
====*====*>>>

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 13 and 14 minutes. Communications delay would be 26+ minutes round trip.

===
Earth Distance: 2024/08/09 232,186,000 (decreasing)
Earth Distance: 2024/08/08 233,269,000 (decreasing)
Earth Distance: 2024/08/07 233,992,000 (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 576 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 576 is Thursday  in the Proposed Business calendar for Mars.   Sol 558 was a Skip Day on Mars. Next is near 585 August 26
##

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 21 of 24: <<== Third month of Quarter 4

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

Place holder for today's Calendar update

Snapshot was taken at 17:00 UTC instead of the usual 12:00.

5 hours will be added to the calculations, and 5 hour will be subtracted tomorrow.

Greenwich, UK 08/10/2024, 18:00:00 Europe/London
Object: Mars  [ ▸ Sky Map ]
RA 04h 51m 14.2s Dec +22° 02' 36.0" Appar J2000
Mag: 0.93 (Estimated: JPL)  Const: Taurus
Sun Dist: 215,344,332 km [25.5 km/s]
Earth Dist: 231,695,638 km [32.1 km/s]

Martian Year:   
37
Martian Astronomical Month:   
11
Solar longitude Ls:   
308.8
Sol number:   
577

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

===
Today on Mars: 0037/21/20 Friday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2024/07/22))

Today on Earth: 2024/08/10 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: 11 <<== The Astronomical month will increment when longitude reaches 330 degrees

===
Solar Longitude: 308.8 Sol Number: 577  Change in degrees is +.6 Julian date is: J0037577
Solar Longitude: 308.2 Sol Number: 576  Change in degrees is +.6 Julian date is: J0037576
Solar Longitude: 307.6 Sol Number: 575  Change in degrees is +.6 Julian date is: J0037575
<<#

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:   215,344,332 km [25.5 km/s] Difference is +198337 <= +6839 km/hour at 12 on 08/10 (time 12:00) (29 hours)
Distance: Mars >> Sun per theskylive.com:   215,145,995 km [25.5 km/s] Difference is +165461 <= +6618 km/hour at 08.2 on 08/09 (time 8:12) (24.2 hours)
Distance: Mars >> Sun per theskylive.com:   214,980,534 km [25.5 km/s] Difference is +162766 <= +6510 km/hour at 08.0 on 08/08 (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 PGC 1664574 – RA 04h 52m 13.9s – Day 0 -
HIP 22443 RA 04h 49m 45.9s – Day 0 – Day 1 – still visible past Mars
====*====*>>>

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 13 and 14 minutes. Communications delay would be 26+ minutes round trip.

===
Earth Distance: 2024/08/10 231,695,000 (decreasing)
Earth Distance: 2024/08/09 232,186,000 (decreasing)
Earth Distance: 2024/08/08 233,269,000 (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 577 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 577 is Friday  in the Proposed Business calendar for Mars.   Sol 558 was a Skip Day on Mars. Next is near 585 August 26
##

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 21 of 24: <<== Third month of Quarter 4

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

Place holder for today's Calendar update

Greenwich, UK 08/11/2024, 12:59:59 Europe/London << 12:00 UTC
Object: Mars  [ ▸ Sky Map ]
RA 04h 53m 27.7s Dec +22° 06' 57.6" Appar J2000
Mag: 0.93 (Estimated: JPL)  Const: Taurus
Sun Dist: 215,476,016 km [25.5 km/s]
Earth Dist: 231,077,976 km [32.0 km/s]

The time span since the previous snapshot is 19 hours

Martian Year:   
37
Martian Astronomical Month:   
11
Solar longitude Ls:   
309.4
Sol number:   
578

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

===
Today on Mars: 0037/21/21 Saturday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2024/07/22))

Today on Earth: 2024/08/11 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: 11 <<== The Astronomical month will increment when longitude reaches 330 degrees

===
Solar Longitude: 309.2 Sol Number: 578  Change in degrees is +.6 Julian date is: J0037578
Solar Longitude: 308.8 Sol Number: 577  Change in degrees is +.6 Julian date is: J0037577
Solar Longitude: 308.2 Sol Number: 576  Change in degrees is +.6 Julian date is: J0037576
<<#

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:   215,476,016 km [25.5 km/s] Difference is +131684 <= +6931 km/hour at 12 on 08/11 (time 12:00) (19 hours)
Distance: Mars >> Sun per theskylive.com:   215,344,332 km [25.5 km/s] Difference is +198337 <= +6839 km/hour at 17 on 08/10 (time 17:00) (29 hours)
Distance: Mars >> Sun per theskylive.com:   215,145,995 km [25.5 km/s] Difference is +165461 <= +6618 km/hour at 08.2 on 08/09 (time 8:12) (24.2 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 above path: PGC 1664663 RA 04h 54m 06.0s – Day 0 -
Galaxy PGC 1664574 – RA 04h 52m 13.9s – Day 0 – Day 1 just past Mars
HIP 22443 RA 04h 49m 45.9s – Day 0 – Day 1 – still visible past Mars – Day 2 still visible with Mars at far left on screen
====*====*>>>

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 13 and 14 minutes. Communications delay would be 26+ minutes round trip.

===
Earth Distance: 2024/08/11 230,939,000 (decreasing)
Earth Distance: 2024/08/10 231,695,000 (decreasing)
Earth Distance: 2024/08/09 232,186,000 (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 578 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 578 is Saturday  in the Proposed Business calendar for Mars.   Sol 558 was a Skip Day on Mars. Next is near 585 August 26
##

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 21 of 24: <<== Third month of Quarter 4

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

Place holder for today's Business Calendar update

Greenwich, UK 08/12/2024, 13:00:00 Europe/London << 12:00:00 UTC
Object: Mars  [ ▸ Sky Map ]
RA 04h 56m 16.3s Dec +22° 12' 15.8" Appar J2000
Mag: 0.92 (Estimated: JPL)  Const: Taurus
Sun Dist: 215,643,286 km [25.5 km/s]
Earth Dist: 230,293,878 km [31.8 km/s]

Martian Year:   
37
Martian Astronomical Month:   
11
Solar longitude Ls:   
309.9
Sol number:   
579

For the record... a period of disruption that started June 24, 2024 has come to an end, as of August 11, 2024.

Hopefully the regular daily Business Calendar updates will resume with the posts of August 12, 2024.

(th)

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

===
Today on Mars: 0037/21/22 Sunday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2024/07/22))
One day note: Jupiter is ahead of and below Mars as seen from Earth -
Today on Earth: 2024/08/12 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: 11 <<== The Astronomical month will increment when longitude reaches 330 degrees

===
Solar Longitude: 309.9 Sol Number: 579  Change in degrees is +.5 Julian date is: J0037579
Solar Longitude: 309.4 Sol Number: 578  Change in degrees is +.6 Julian date is: J0037578
Solar Longitude: 308.8 Sol Number: 577  Change in degrees is +.6 Julian date is: J0037577
<<#

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:   215,643,286 km [25.5 km/s] Difference is +167270 <= +6969 km/hour at 12 on 08/12 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   215,476,016 km [25.5 km/s] Difference is +131684 <= +6931 km/hour at 12 on 08/11 (time 12:00) (19 hours)
Distance: Mars >> Sun per theskylive.com:   215,344,332 km [25.5 km/s] Difference is +198337 <= +6839 km/hour at 17 on 08/10 (time 17:00) (29 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 1293-1359-1 RA 04h 58m 13.0s – Day 0 -
Note that Mars itself is shown as RA 04h 57m 39.5s and Dec +22 degrees 14 minutes 47.0 seconds
Jupiter is nearby at RA 05h 01m 18.4s Declination +22 degrees 03 minutes 10.8 seconds
The Planetarium shows Mars above Jupiter and slightly to the right
PGC 1664663 RA 04h 54m 06.0s – Day 0 – Day 1 just barely off the screen
====*====*>>>

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 13 and 14 minutes. Communications delay would be 26+ minutes round trip.

===
Earth Distance: 2024/08/12 229,900,000 (decreasing)
Earth Distance: 2024/08/11 230,939,000 (decreasing)
Earth Distance: 2024/08/10 231,695,000 (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 579 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 579 is Sunday  in the Proposed Business calendar for Mars.   Sol 558 was a Skip Day on Mars. Next is near 585 August 26
##

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 21 of 24: <<== Third month of Quarter 4

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

Place Holder for today's Calendar update

Greenwich, UK 08/13/2024, 13:00:01 Europe/London << 12:00:01 UTC
Object: Mars  [ ▸ Sky Map ]
RA 04h 59m 04.4s Dec +22° 17' 21.8" Appar J2000
Mag: 0.92 (Estimated: JPL)  Const: Taurus
Sun Dist: 215,811,578 km [25.4 km/s]
Earth Dist: 229,505,436 km [31.6 km/s]

Mars and Jupiter are continuing to close the gap as seen from Earth.  TheSkyLive.com displays for Mars and Jupiter now overlap. Mars is above and to the right of Jupiter. Star TYC 1293-1157-1 is present in both panels. The star is about midway between the two planets as seen from Earth. Projection of the path of Mars indicates the planet will pass just above TYC 1293-1157-1, so it should be well within the Jupiter panel in the next day or so.

Practice snapshot using Ubuntu 22.04
Greenwich, UK 08/13/2024, 12:50:49 Europe/London
Object: Mars  [ ▸ Sky Map ]
RA 04h 59m 03.4s Dec +22° 17' 19.9" Appar J2000
Mag: 0.92 (Estimated: JPL)  Const: Taurus
Sun Dist: 215,810,500 km [25.4 km/s]
Earth Dist: 229,510,487 km [31.6 km/s]

Practice snapshot using Chromium:

Martian Year:   
37
Martian Astronomical Month:   
11
Solar longitude Ls:   
310.5
Sol number:   
580

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

===
Today on Mars: 0037/21/23 Monday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2024/07/22))
One day note: Jupiter is ahead of and below Mars as seen from Earth – the two planets now appear in the Mars-Tracker display at Theskylive.com
Today on Earth: 2024/08/13 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: 11 <<== The Astronomical month will increment when longitude reaches 330 degrees

===
Solar Longitude: 310.5 Sol Number: 580  Change in degrees is +.6 Julian date is: J0037580
Solar Longitude: 309.9 Sol Number: 579  Change in degrees is +.5 Julian date is: J0037579
Solar Longitude: 309.4 Sol Number: 578  Change in degrees is +.6 Julian date is: J0037578
<<#

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:   215,811,578 km [25.4 km/s] Difference is +168292 <= +7012 km/hour at 12 on 08/13 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   215,643,286 km [25.5 km/s] Difference is +167270 <= +6969 km/hour at 12 on 08/12 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   215,476,016 km [25.5 km/s] Difference is +131684 <= +6931 km/hour at 12 on 08/11 (time 12:00) (19 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 below path TYC 1293-439-1 RA 05h 00m 29.3s – Day 0
TYC 1293-1359-1 RA 04h 58m 13.0s – Day 0 - - Day 1 just past Mars
Jupiter is visible in the lower left of the Mars-Tracker panel
====*====*>>>

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 13 and 14 minutes. Communications delay would be 26+ minutes round trip.

===
Earth Distance: 2024/08/13 229,249,000 (decreasing)
Earth Distance: 2024/08/12 229,900,000 (decreasing)
Earth Distance: 2024/08/11 230,939,000 (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 580 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 580 is Monday  in the Proposed Business calendar for Mars.   Sol 558 was a Skip Day on Mars. Next is near 585 August 26
##

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 21 of 24: <<== Third month of Quarter 4

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

Place holder for today's Calendar update ....

Greenwich, UK 08/14/2024, 12:59:59 Europe/London 12:00 UTC
Object: Mars  [ ▸ Sky Map ]
RA 05h 01m 52.5s Dec +22° 22' 17.2" Appar J2000
Mag: 0.90 (Estimated: JPL)  Const: Taurus
Sun Dist: 215,980,864 km [25.4 km/s]
Earth Dist: 228,712,677 km [31.5 km/s]

Martian Year:   
37
Martian Astronomical Month:   
11
Solar longitude Ls:   
311.1
Sol number:   
581

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

===
Today on Mars: 0037/21/24 Tuesday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2024/07/22))
One day note: Mars is ahead of and above Jupiter as seen from Earth – the two planets now appear in the Mars-Tracker display at Theskylive.com
Today on Earth: 2024/08/14 Wednesday 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: 11 <<== The Astronomical month will increment when longitude reaches 330 degrees

===
Solar Longitude: 311.1 Sol Number: 581  Change in degrees is +.6 Julian date is: J0037581
Solar Longitude: 310.5 Sol Number: 580  Change in degrees is +.6 Julian date is: J0037580
Solar Longitude: 309.9 Sol Number: 579  Change in degrees is +.5 Julian date is: J0037579
<<#

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:   215,980,864 km [25.4 km/s] Difference is +169286 <= +7054 km/hour at 12 on 08/14 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   215,811,578 km [25.4 km/s] Difference is +168292 <= +7012 km/hour at 12 on 08/13 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   215,643,286 km [25.5 km/s] Difference is +167270 <= +6969 km/hour at 12 on 08/12 (time 12:00) (24 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: There are numerous stars in the path – TYC 1293-369-1 RA 05h 03m 49.0s – Day 0 -
TYC 1293-439-1 RA 05h 00m 29.3s – Day 0  Day 1 – past the 10 hours marker – last day for 439
Jupiter is visible in the Mars-Tracker panel
====*====*>>>

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 13 and 14 minutes. Communications delay would be 26+ minutes round trip.

===
Earth Distance: 2024/08/14 228,712,000 (decreasing)
Earth Distance: 2024/08/13 229,249,000 (decreasing)
Earth Distance: 2024/08/12 229,900,000 (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 581 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 581 is Tuesday  in the Proposed Business calendar for Mars.   Sol 558 was a Skip Day on Mars. Next is near 585 August 26
##

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 21 of 24: <<== Third month of Quarter 4

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

Place holder for today's Calendar update:

Greenwich, UK 08/15/2024, 12:59:43 Europe/London << 12:00 UTC
Object: Mars  [ ▸ Sky Map ]
RA 05h 04m 40.1s Dec +22° 27' 01.1" Appar J2000
Mag: 0.89 (Estimated: JPL)  Const: Taurus
Sun Dist: 216,151,104 km [25.4 km/s]
Earth Dist: 227,915,691 km [31.3 km/s]

Martian Year:   
37
Martian Astronomical Month:   
11
Solar longitude Ls:   
311.7
Sol number:   
582

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

===
Today on Mars: 0037/21/25 Wednesday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2024/07/22))

Today on Earth: 2024/08/15 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: 11 <<== The Astronomical month will increment when longitude reaches 330 degrees

===
Solar Longitude: 311.7 Sol Number: 582  Change in degrees is +.6 Julian date is: J0037582
Solar Longitude: 311.1 Sol Number: 581  Change in degrees is +.6 Julian date is: J0037581
Solar Longitude: 310.5 Sol Number: 580  Change in degrees is +.6 Julian date is: J0037580
<<#

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:   216,151,104 km [25.4 km/s] Difference is +170240 <= +7093 km/hour at 12 on 08/15 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   215,980,864 km [25.4 km/s] Difference is +169286 <= +7054 km/hour at 12 on 08/14 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   215,811,578 km [25.4 km/s] Difference is +168292 <= +7012 km/hour at 12 on 08/13 (time 12:00) (24 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 1845-643-1 RA 05h 05m 06.9s – Day 0 -
TYC 1293-369-1 RA 05h 03m 49.0s – Day 0 – Day 1 Right at Mars – this star might last another day
====*====*>>>

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 13 and 14 minutes. Communications delay would be 26+ minutes round trip.

===
Earth Distance: 2024/08/15 227,758,000 (decreasing)
Earth Distance: 2024/08/14 228,712,000 (decreasing)
Earth Distance: 2024/08/13 229,249,000 (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 582 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 582 is Wednesday  in the Proposed Business calendar for Mars.   Sol 558 was a Skip Day on Mars. Next is near 585 August 26
##

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 21 of 24: <<== Third month of Quarter 4

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

Place holder for today's Calendar update...

Greenwich, UK 08/16/2024, 13:00:00 Europe/London << 12:00 UTC
Object: Mars  [ ▸ Sky Map ]
RA 05h 07m 27.2s Dec +22° 31' 34.5" Appar J2000
Mag: 0.90 (Estimated: JPL)  Const: Taurus
Sun Dist: 216,322,373 km [25.4 km/s]
Earth Dist: 227,114,012 km [31.1 km/s]

Martian Year:   
37
Martian Astronomical Month:   
11
Solar longitude Ls:   
312.3
Sol number:   
583

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

===
Today on Mars: 0037/21/26 Thursday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2024/07/22))

Today on Earth: 2024/08/16 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: 11 <<== The Astronomical month will increment when longitude reaches 330 degrees

===
Solar Longitude: 312.3 Sol Number: 583  Change in degrees is +.6 Julian date is: J0037583
Solar Longitude: 311.7 Sol Number: 582  Change in degrees is +.6 Julian date is: J0037582
Solar Longitude: 311.1 Sol Number: 581  Change in degrees is +.6 Julian date is: J0037581
<<#

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:   216,322,373 km [25.4 km/s] Difference is +171269 <= +7136 km/hour at 12 on 08/16 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   216,151,104 km [25.4 km/s] Difference is +170240 <= +7093 km/hour at 12 on 08/15 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   215,980,864 km [25.4 km/s] Difference is +169286 <= +7054 km/hour at 12 on 08/14 (time 12:00) (24 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 below path: TYC 1845-3566-1 RA 05h 08m 54.8s – Day 0 -
TYC 1845-643-1 RA 05h 05m 06.9s – Day 0 – Day 1 at the far right edge of the view – last moments for 643
====*====*>>>

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 13 and 14 minutes. Communications delay would be 26+ minutes round trip.

===
Earth Distance: 2024/08/16 226,875,000 (decreasing)
Earth Distance: 2024/08/15 227,758,000 (decreasing)
Earth Distance: 2024/08/14 228,712,000 (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 583 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 583 is Thursday  in the Proposed Business calendar for Mars.   Sol 558 was a Skip Day on Mars. Next is near 585 August 26
##

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 21 of 24: <<== Third month of Quarter 4

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

Place holder for today's Calendar update...

Snapshot at 12:00 UTC
Greenwich, UK 08/17/2024, 13:00:00 Europe/London
Object: Mars  [ ▸ Sky Map ]
RA 05h 10m 14.3s Dec +22° 35' 56.6" Appar J2000
Mag: 0.91 (Estimated: JPL)  Const: Taurus
Sun Dist: 216,494,553 km [25.4 km/s]
Earth Dist: 226,308,060 km [31.0 km/s]

Snapshot at 11:00 UtC
Greenwich, UK 08/17/2024, 12:00:00 Europe/London
Object: Mars  [ ▸ Sky Map ]
RA 05h 10m 07.4s Dec +22° 35' 46.2" Appar J2000
Mag: 0.91 (Estimated: JPL)  Const: Taurus
Sun Dist: 216,487,360 km [25.4 km/s]
Earth Dist: 226,341,733 km [31.0 km/s]

Martian Year:   
37
Martian Astronomical Month:   
11
Solar longitude Ls:   
312.8
Sol number:   
584

(th)

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

===
Today on Mars: 0037/21/27 Friday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2024/07/22))

Today on Earth: 2024/08/17 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: 11 <<== The Astronomical month will increment when longitude reaches 330 degrees

===
Solar Longitude: 312.8 Sol Number: 584  Change in degrees is +.5 Julian date is: J0037584
Solar Longitude: 312.3 Sol Number: 583  Change in degrees is +.6 Julian date is: J0037583
Solar Longitude: 311.7 Sol Number: 582  Change in degrees is +.6 Julian date is: J0037582
<<#

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:   216,494,553 km [25.4 km/s] Difference is +172180 <= +7174 km/hour at 12 on 08/17 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   216,322,373 km [25.4 km/s] Difference is +171269 <= +7136 km/hour at 12 on 08/16 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   216,151,104 km [25.4 km/s] Difference is +170240 <= +7093 km/hour at 12 on 08/15 (time 12:00) (24 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 10 hours marker: TYC 1846-704-1 RA 05h 10m 1.7s – Day 0 -
TYC 1845-3566-1 RA 05h 08m 54.8s – Day 0 – Day 1 Below and just past Mars – This star might be visible tomorrow
====*====*>>>

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 13 and 14 minutes. Communications delay would be 26+ minutes round trip.

===
Earth Distance: 2024/08/17 226,247,000 (decreasing)
Earth Distance: 2024/08/16 226,875,000 (decreasing)
Earth Distance: 2024/08/15 227,758,000 (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 584 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 584 is Friday  in the Proposed Business calendar for Mars.   Sol 558 was a Skip Day on Mars. Next is near 595 August 26
##

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 21 of 24: <<== Third month of Quarter 4

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

Place holder for today's Calendar update

Greenwich, UK 08/18/2024, 13:00:03 Europe/London << 12:00:03 UTC
Object: Mars  [ ▸ Sky Map ]
RA 05h 13m 00.9s Dec +22° 40' 07.1" Appar J2000
Mag: 0.89 (Estimated: JPL)  Const: Taurus
Sun Dist: 216,667,663 km [25.4 km/s]
Earth Dist: 225,497,623 km [30.8 km/s]

Martian Year:   
37
Martian Astronomical Month:   
11
Solar longitude Ls:   
313.4
Sol number:   
585

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

===
Today on Mars: 0037/21/28 Saturday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2024/07/22))
One day note: Last day of Month 21
Today on Earth: 2024/08/18 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: 11 <<== The Astronomical month will increment when longitude reaches 330 degrees

===
Solar Longitude: 313.4 Sol Number: 585  Change in degrees is +.6 Julian date is: J0037585
Solar Longitude: 312.8 Sol Number: 584  Change in degrees is +.5 Julian date is: J0037584
Solar Longitude: 312.3 Sol Number: 583  Change in degrees is +.6 Julian date is: J0037583
<<#

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:   216,667,663 km [25.4 km/s] Difference is +173110 <= +7213 km/hour at 12 on 08/18 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   216,494,553 km [25.4 km/s] Difference is +172180 <= +7174 km/hour at 12 on 08/17 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   216,322,373 km [25.4 km/s] Difference is +171269 <= +7136 km/hour at 12 on 08/16 (time 12:00) (24 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: Bracket just past 10 hour marker: TYC 1846-80-1 and TYC 1846-914-1 – Day 0
TYC 1846-704-1 RA 05h 10m 1.7s – Day 0 – Day 1 well past 10 hours marker … last hours for 704
====*====*>>>

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 13 and 14 minutes. Communications delay would be 26+ minutes round trip.

===
Earth Distance: 2024/08/18 225,372,000 (decreasing)
Earth Distance: 2024/08/17 226,247,000 (decreasing)
Earth Distance: 2024/08/16 226,875,000 (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 585 is in Month 21 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  21 extends from Sol 558 through 585. <<== There are 28 days in Month 21. See post 82 of Holidays topic for current details.
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 585 is Saturday  in the Proposed Business calendar for Mars.   Sol 558 was a Skip Day on Mars. Next is near 595 August 26
##

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 21 of 24: <<== Third month of Quarter 4

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,427

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

Place holder for today's Calendar update:

Greenwich, UK 08/19/2024, 13:00:02 Europe/London << 12:00:02 UTC
Object: Mars  [ ▸ Sky Map ]
RA 05h 15m 47.0s Dec +22° 44' 07.4" Appar J2000
Mag: 0.88 (Estimated: JPL)  Const: Taurus
Sun Dist: 216,841,672 km [25.3 km/s]
Earth Dist: 224,682,694 km [30.6 km/s]

Martian Year:   
37
Martian Astronomical Month:   
11
Solar longitude Ls:   
314
Sol number:   
586

(th)