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===
Today on Mars: 0038/01/27 Friday Days of the week offset 4 with Earth. (count from Mars to Earth )
Retrograde movement is under way. The sky trace is swinging upward and now back.
Today on Earth: 2024/12/10 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: 38 Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees
===
Solar Longitude: 013.4 Sol Number: 027 Change in degrees is +.5 Julian date is: J0038027
Solar Longitude: 012.9 Sol Number: 026 Change in degrees is +.5 Julian date is: J0038026
Solar Longitude: 012.4 Sol Number: 025 Change in degrees is +.5 Julian date is: J0038025
<<#
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: 237,922,795 km [23.1 km/s] Difference is +165300 <= +6888 km/hour at 12 on 12/10 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 237,757,495 km [23.1 km/s] Difference is +166180 <= +6924 km/hour at 12 on 12/09 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 237,424,273 km [23.1 km/s] Difference is +167880 <= +6995 km/hour at 12 on 12/07 (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.
Note: Mars will go retrograde starting December 6, 2024 and continue through February 23, 2025.
=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth. Slant .005 degrees.
TYC TYC 1398-795-1 RA 08h 35m 12.8s Day 0 – Day 1 above Mars
PGC 1695573 RA 08h 36m 8.3s Just outside curved path at 72 hours marker – Day 2 same Day 3 same Day 4 even with Mars Day 5 below Mars
HIP 42083 RA 08h 34m 39.2s – Day 0 40 Day 1 Mars Day 2 51 Day 3 61+ Day 4 100+ Day 5+6+7+8+9 inside and below Mars-Sun line
====*====*>>>
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 6 and 7 minutes. Communications delay would be 12+ minutes round trip.
===
Earth Distance in km: 2024/12/10 111,667,000 (decreasing)
Earth Distance in km: 2024/12/09 112,241,000 (decreasing)
Earth Distance in km: 2024/12/08 113,492,000 (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) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in 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 27 is in Month 1 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 1 extends from Sol 1 through 28. <<== 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 27 is Friday in the Proposed Business calendar for Mars. Sol 13 was a Skip Day on Mars. Next is near 50 of Year 38
##
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 1 of 24: First month of Quarter 1 and first month of Mars Year 38
Offline
Like button can go here
Place holder for today's Calendar update:
Greenwich, UK 12/11/2024, 13:00:04 Europe/London
Object: Mars (open sky map)
RA 08h 36m 48.7s Dec +21° 41' 48.4" Appar J2000
Mag: -0.67 (Estimated: JPL) Const: Cancer
Sun Dist: 238,087,231 km [23.1 km/s]
Earth Dist: 111,001,970 km [9.8 km/s]
Martian Year:
38
Martian Astronomical Month:
1
Solar longitude Ls:
13.8
Sol number:
28
Offline
Like button can go here
===
Today on Mars: 0038/01/28 Saturday Days of the week offset 4 with Earth. (count from Mars to Earth )
Retrograde movement is under way. The sky trace is swinging upward and now back.
Today on Earth: 2024/12/11 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: 38 Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees
===
Solar Longitude: 013.8 Sol Number: 028 Change in degrees is +.4 Julian date is: J0038028
Solar Longitude: 013.4 Sol Number: 027 Change in degrees is +.5 Julian date is: J0038027
Solar Longitude: 012.9 Sol Number: 026 Change in degrees is +.5 Julian date is: J0038026
<<#
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: 238,087,231 km [23.1 km/s] Difference is +164436 <= +6852 km/hour at 12 on 12/11 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 237,922,795 km [23.1 km/s] Difference is +165300 <= +6888 km/hour at 12 on 12/10 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 237,757,495 km [23.1 km/s] Difference is +166180 <= +6924 km/hour at 12 on 12/09 (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.
Note: Mars will go retrograde starting December 6, 2024 and continue through February 23, 2025.
=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth. Slant .005 degrees.
TYC TYC 1398-795-1 RA 08h 35m 12.8s Day 0 – Day 1 above Mars – Day 2 still above
PGC 1695573 RA 08h 36m 8.3s Just outside curved path at 72 hours marker – Day 2+3+4 same Day 5 below Mars
HIP 42083 RA 08h 34m 39.2s – Day 0 40 Day 1 Mars Day 2 51 Day 3 61+ Day 4 100+ Day 5+6+7+8+9+10 inside and below Mars-Sun line
====*====*>>>
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 6 and 7 minutes. Communications delay would be 12+ minutes round trip.
===
Earth Distance in km: 2024/12/11 110,911,000 (decreasing)
Earth Distance in km: 2024/12/10 111,667,000 (decreasing)
Earth Distance in km: 2024/12/09 112,241,000 (decreasing)
#>
Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396
Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in 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 28 is in Month 1 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 1 extends from Sol 1 through 28. <<== 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 28 is Saturday in the Proposed Business calendar for Mars. Sol 13 was a Skip Day on Mars. Next is near 50 of Year 38
##
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 1 of 24: First month of Quarter 1 and first month of Mars Year 38
Offline
Like button can go here
Place holder for today's Calendar update:
Greenwich, UK 12/12/2024, 13:03:40 Europe/London
Object: Mars (open sky map)
RA 08h 36m 34.1s Dec +21° 45' 32.7" Appar J2000
Mag: -0.71 (Estimated: JPL) Const: Cancer
Sun Dist: 238,251,179 km [23.1 km/s]
Earth Dist: 110,174,511 km [9.7 km/s]
Martian Year:
38
Martian Astronomical Month:
1
Solar longitude Ls:
14.3
Sol number:
29
Offline
Like button can go here
===
Today on Mars: 0038/02/01 Sunday Days of the week offset 4 with Earth. (count from Mars to Earth )
Retrograde movement is under way. The sky trace is swinging upward and now back.
Today on Earth: 2024/12/12 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: 38 Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees
===
Solar Longitude: 014.3 Sol Number: 029 Change in degrees is +.5 Julian date is: J0038029
Solar Longitude: 013.8 Sol Number: 028 Change in degrees is +.4 Julian date is: J0038028
Solar Longitude: 013.4 Sol Number: 027 Change in degrees is +.5 Julian date is: J0038027
<<#
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: 238,251,179 km [23.1 km/s] Difference is +163948 <= +6831 km/hour at 12 on 12/12 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 238,087,231 km [23.1 km/s] Difference is +164436 <= +6852 km/hour at 12 on 12/11 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 237,922,795 km [23.1 km/s] Difference is +165300 <= +6888 km/hour at 12 on 12/10 (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.
Note: Mars will go retrograde starting December 6, 2024 and continue through February 23, 2025.
=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth. Slant .005 degrees.
Next up on the way back: TYC 1398-1103-1 RA 08h 34m 1.8s – Day 0
TYC TYC 1398-795-1 RA 08h 35m 12.8s Day 0 – Day 1 above Mars – Day 2 still above Day 3 just below
PGC 1695573 RA 08h 36m 8.3s Just outside curved path at 72 hours marker – Day 2+3+4 same Day 5 below Mars Day 6 below and last 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 6 and 7 minutes. Communications delay would be 12+ minutes round trip.
===
Earth Distance in km: 2024/12/12 108,859,000 (decreasing)
Earth Distance in km: 2024/12/11 110,911,000 (decreasing)
Earth Distance in km: 2024/12/10 111,667,000 (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) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in 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 29 is in Month 2 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 2 extends from Sol 29 through 56. <<== 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 29 is Sunday in the Proposed Business calendar for Mars. Sol 13 was a Skip Day on Mars. Next is near 50 of Year 38
##
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 2 of 24: Quarter 1 [Month 2-6] (This month has 28 Sols)
Offline
Like button can go here
Place holder for today's Calendar update
Greenwich, UK 12/13/2024, 13:00:16 Europe/London
Object: Mars (open sky map)
RA 08h 36m 16.6s Dec +21° 49' 28.1" Appar J2000
Mag: -0.75 (Estimated: JPL) Const: Cancer
Sun Dist: 238,413,434 km [23.0 km/s]
Earth Dist: 109,367,841 km [9.5 km/s]
Martian Year:
38
Martian Astronomical Month:
1
Solar longitude Ls:
14.8
Sol number:
30
Offline
Like button can go here
===
Today on Mars: 0038/02/02 Monday Days of the week offset 4 with Earth. (count from Mars to Earth )
Retrograde movement is under way. The sky trace is swinging upward and now back.
Today on Earth: 2024/12/13 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: 38 Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees
===
Solar Longitude: 014.8 Sol Number: 030 Change in degrees is +.5 Julian date is: J0038030
Solar Longitude: 014.3 Sol Number: 029 Change in degrees is +.5 Julian date is: J0038029
Solar Longitude: 013.8 Sol Number: 028 Change in degrees is +.4 Julian date is: J0038028
<<#
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: 238,413,434 km [23.0 km/s] Difference is +163948 <= +6831 km/hour at 12 on 12/12 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 238,251,179 km [23.1 km/s] Difference is +163948 <= +6831 km/hour at 12 on 12/12 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 238,087,231 km [23.1 km/s] Difference is +164436 <= +6852 km/hour at 12 on 12/11 (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.
Note: Mars will go retrograde starting December 6, 2024 and continue through February 23, 2025.
=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth. Slant .005 degrees.
TYC 1398-1103-1 RA 08h 34m 1.8s – Day 0 – Day 1 34 hours ahead
TYC TYC 1398-795-1 RA 08h 35m 12.8s Day 0 – Day 1 above Mars – Day 2 still above Day 3 just below Day 4 34.5 hours ago
====*====*>>>
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 6 and 7 minutes. Communications delay would be 12+ minutes round trip.
===
Earth Distance in km: 2024/12/13 109,126,000 (decreasing) <<< Computer program at TheSkyLive was reset, apparently
Earth Distance in km: 2024/12/12 108,859,000 (decreasing)
Earth Distance in km: 2024/12/11 110,911,000 (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) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in 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 30 is in Month 2 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 2 extends from Sol 29 through 56. <<== 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 30 is Monday in the Proposed Business calendar for Mars. Sol 13 was a Skip Day on Mars. Next is near 50 of Year 38
##
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 2 of 24: Quarter 1 [Month 2-6] (This month has 28 Sols)
Offline
Like button can go here
Place holder for today's Calender update.
Greenwich, UK 12/14/2024, 13:00:07 Europe/London
Object: Mars (open sky map)
RA 08h 35m 55.5s Dec +21° 53' 36.0" Appar J2000
Mag: -0.79 (Estimated: JPL) Const: Cancer
Sun Dist: 238,575,147 km [23.0 km/s]
Earth Dist: 108,576,706 km [9.4 km/s]
Martian Year:
38
Martian Astronomical Month:
1
Solar longitude Ls:
15.3
Sol number:
31
Offline
Like button can go here
===
Today on Mars: 0038/02/03 Tuesday Days of the week offset 4 with Earth. (count from Mars to Earth )
Retrograde movement is under way. The sky trace is swinging back and upward at about 60 degrees
Today on Earth: 2024/12/14 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: 38 Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees
===
Solar Longitude: 015.3 Sol Number: 031 Change in degrees is +.5 Julian date is: J0038031
Solar Longitude: 014.8 Sol Number: 030 Change in degrees is +.5 Julian date is: J0038030
Solar Longitude: 014.3 Sol Number: 029 Change in degrees is +.5 Julian date is: J0038029
<<#
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: 238,575,147 km [23.0 km/s] Difference is +161713 <= +6738 km/hour at 12 on 12/14 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 238,413,434 km [23.0 km/s] Difference is +163948 <= +6761 km/hour at 12 on 12/13 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 238,251,179 km [23.1 km/s] Difference is +163948 <= +6831 km/hour at 12 on 12/12 (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.
Note: Mars will go retrograde starting December 6, 2024 and continue through February 23, 2025.
=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth. Slant .005 degrees.
Next up: Galaxy PGC 24021 above track on Day 0 RA 08h 33m 44.7s -
TYC 1398-1103-1 RA 08h 34m 1.8s – Day 0 – Day 1 34 hours ahead Day 2 abreast of Mars on inside of track
TYC TYC 1398-795-1 RA 08h 35m 12.8s Day 0 – Day 1 above Mars – Day 2 still above Day 3 just below Day 4 34.5 Day 5 60 hours ago
====*====*>>>
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 6 and 7 minutes. Communications delay would be 12+ minutes round trip.
===
Earth Distance in km: 2024/12/14 108,384,000 (decreasing)
Earth Distance in km: 2024/12/13 109,126,000 (decreasing) <<< Computer program at TheSkyLive was reset, apparently
Earth Distance in km: 2024/12/12 108,859,000 (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) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in 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 31 is in Month 2 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 2 extends from Sol 29 through 56. <<== 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 31 is Tuesday in the Proposed Business calendar for Mars. Sol 13 was a Skip Day on Mars. Next is near 50 of Year 38
##
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 2 of 24: Quarter 1 [Month 2-6] (This month has 28 Sols)
Offline
Like button can go here
Place Holder for today's Calendar update:
Greenwich, UK 12/15/2024, 13:00:00 Europe/London
Object: Mars (open sky map)
RA 08h 35m 30.9s Dec +21° 57' 56.0" Appar J2000
Mag: -0.82 (Estimated: JPL) Const: Cancer
Sun Dist: 238,735,945 km [23.0 km/s]
Earth Dist: 107,803,518 km [9.3 km/s]
Martian Year:
38
Martian Astronomical Month:
1
Solar longitude Ls:
15.8
Sol number:
32
Offline
Like button can go here
===
Today on Mars: 0038/02/04 Wednesday Days of the week offset 4 with Earth. (count from Mars to Earth )
Retrograde movement is under way. The sky trace is swinging back and upward at about 60 degrees
Today on Earth: 2024/12/15 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: 38 Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees
===
Solar Longitude: 015.8 Sol Number: 032 Change in degrees is +.5 Julian date is: J0038032
Solar Longitude: 015.3 Sol Number: 031 Change in degrees is +.5 Julian date is: J0038031
Solar Longitude: 014.8 Sol Number: 030 Change in degrees is +.5 Julian date is: J0038030
<<#
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 http://www.planetary.org)
Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations. The calculations use tenths of hours. The Sun Distance needs to be captured at the moment the time increments to a given tenth.
Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun. Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.
===
Distance: Mars >> Sun per theskylive.com: 238,735,945 km [23.0 km/s] Difference is +160798 <= +6700 km/hour at 12 on 12/15 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 238,575,147 km [23.0 km/s] Difference is +161713 <= +6738 km/hour at 12 on 12/14 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 238,413,434 km [23.0 km/s] Difference is +163948 <= +6761 km/hour at 12 on 12/13 (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.
Note: Mars will go retrograde starting December 6, 2024 and continue through February 23, 2025.
=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth. Slant .005 degrees.
PGC 24021 above track on Day 0 RA 08h 33m 44.7s – Day 1 ahead 24 hours or so
TYC 1398-1103-1 RA 08h 34m 1.8s – Day 0 – Day 1 34 hours ahead Day 2 abreast of Mars on inside of track Day 3 below Mars
TYC TYC 1398-795-1 RA 08h 35m 12.8s Day 0 – Day 1 above Mars – Day 2 Day 3 Day 4 34.5 Day 5 60 hours ago Day 6 > 55 hours ago
====*====*>>>
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 6 and 7 minutes. Communications delay would be 12+ minutes round trip.
===
Earth Distance in km: 2024/12/15 107,610,000 (decreasing)
Earth Distance in km: 2024/12/14 108,384,000 (decreasing)
Earth Distance in km: 2024/12/13 109,126,000 (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) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in 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 32 is in Month 2 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 2 extends from Sol 29 through 56. <<== 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 32 is Wednesday in the Proposed Business calendar for Mars. Sol 13 was a Skip Day on Mars. Next is near 50 of Year 38
##
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 2 of 24: Quarter 1 [Month 2-6] (This month has 28 Sols)
Offline
Like button can go here
Place holder for today's Calendar update:
Greenwich, UK 12/16/2024, 13:00:11 Europe/London
Object: Mars (open sky map)
RA 08h 35m 02.8s Dec +22° 02' 28.4" Appar J2000
Mag: -0.85 (Estimated: JPL) Const: Cancer
Sun Dist: 238,895,846 km [23.0 km/s]
Earth Dist: 107,048,760 km [9.1 km/s]
Martian Year:
38
Martian Astronomical Month:
1
Solar longitude Ls:
16.2
Sol number:
33
Offline
Like button can go here
===
Today on Mars: 0038/02/05 Thursday Days of the week offset 4 with Earth. (count from Mars to Earth )
Retrograde movement is under way. The sky trace is swinging back and upward at about 60 degrees
Today on Earth: 2024/12/16 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: 38 Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees
===
Solar Longitude: 016.2 Sol Number: 033 Change in degrees is +.4 Julian date is: J0038033
Solar Longitude: 015.8 Sol Number: 032 Change in degrees is +.5 Julian date is: J0038032
Solar Longitude: 015.3 Sol Number: 031 Change in degrees is +.5 Julian date is: J0038031
<<#
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 http://www.planetary.org)
Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations. The calculations use tenths of hours. The Sun Distance needs to be captured at the moment the time increments to a given tenth.
Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun. Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.
===
Distance: Mars >> Sun per theskylive.com: 238,895,846 km [23.0 km/s] Difference is +159901 <= +6663 km/hour at 12 on 12/16 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 238,735,945 km [23.0 km/s] Difference is +160798 <= +6700 km/hour at 12 on 12/15 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 238,575,147 km [23.0 km/s] Difference is +161713 <= +6738 km/hour at 12 on 12/14 (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.
Note: Mars will go retrograde starting December 6, 2024 and continue through February 23, 2025.
=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth. Slant .005 degrees.
PGC 24021 above track on Day 0 RA 08h 33m 44.7s – Day 1 ahead Day 2 just above Mars
TYC 1398-1103-1 RA 08h 34m 1.8s – Day 0 – Day 1 34 hours ahead Day 2 abreast of Mars on inside of track Day 3 below Mars Day 4 25+
TYC TYC 1398-795-1 RA 08h 35m 12.8s Day 0 – Day 1 above Mars – Day 2 Day 3 Day 4 34.5 Day 5 60 hours ago Day 6 > 55 Day 7 off 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 6 and 7 minutes. Communications delay would be 12+ minutes round trip.
===
Earth Distance in km: 2024/12/16 106,988,000 (decreasing)
Earth Distance in km: 2024/12/15 107,610,000 (decreasing)
Earth Distance in km: 2024/12/14 108,384,000 (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) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in 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 33 is in Month 2 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 2 extends from Sol 29 through 56. <<== 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 33 is Thursday in the Proposed Business calendar for Mars. Sol 13 was a Skip Day on Mars. Next is near 50 of Year 38
##
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 2 of 24: Quarter 1 [Month 2-6] (This month has 28 Sols)
Offline
Like button can go here
Place holder for today's Calendar update
Greenwich, UK 12/17/2024, 13:00:02 Europe/London
Object: Mars (open sky map)
RA 08h 34m 31.3s Dec +22° 07' 12.0" Appar J2000
Mag: -0.88 (Estimated: JPL) Const: Cancer
Sun Dist: 239,054,771 km [23.0 km/s]
Earth Dist: 106,313,377 km [9.0 km/s]
Martian Year:
38
Martian Astronomical Month:
1
Solar longitude Ls:
16.7
Sol number:
34
Offline
Like button can go here
===
Today on Mars: 0038/02/06 Friday Days of the week offset 4 with Earth. (count from Mars to Earth )
Retrograde movement is under way. The sky trace is swinging back and upward at about 40 degrees using online protractor
Today on Earth: 2024/12/17 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: 38 Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees
===
Solar Longitude: 016.7 Sol Number: 034 Change in degrees is +.5 Julian date is: J0038034
Solar Longitude: 016.2 Sol Number: 033 Change in degrees is +.4 Julian date is: J0038033
Solar Longitude: 015.8 Sol Number: 032 Change in degrees is +.5 Julian date is: J0038032
<<#
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 http://www.planetary.org)
Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations. The calculations use tenths of hours. The Sun Distance needs to be captured at the moment the time increments to a given tenth.
Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun. Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.
===
Distance: Mars >> Sun per theskylive.com: 239,054,771 km [23.0 km/s] Difference is +158925 <= +6623 km/hour at 12 on 12/17 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 238,895,846 km [23.0 km/s] Difference is +159901 <= +6663 km/hour at 12 on 12/16 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 238,735,945 km [23.0 km/s] Difference is +160798 <= +6700 km/hour at 12 on 12/15 (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.
Note: Mars will go retrograde starting December 6, 2024 and continue through February 23, 2025.
=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth. Slant .005 degrees.
Next up: Galaxy in path PGC 1668781 RA 08h 31m 49.2s – Day 0
PGC 24021 above track on Day 0 RA 08h 33m 44.7s – Day 1 ahead Day 2 just above Mars – Day 3 22 past
TYC 1398-1103-1 RA 08h 34m 1.8s – Day 0 – Day 1 34 hours ahead Day 2 abreast of Mars on inside Day 3 below Day 4 25+ Day 5 45+
====*====*>>>
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 6 and 7 minutes. Communications delay would be 12+ minutes round trip.
===
Earth Distance in km: 2024/12/17 106,213,000 (decreasing)
Earth Distance in km: 2024/12/16 106,988,000 (decreasing)
Earth Distance in km: 2024/12/15 107,610,000 (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) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in 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 34 is in Month 2 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 2 extends from Sol 29 through 56. <<== 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 34 is Friday in the Proposed Business calendar for Mars. Sol 13 was a Skip Day on Mars. Next is near 50 of Year 38
##
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 2 of 24: Quarter 1 [Month 2-6] (This month has 28 Sols)
Offline
Like button can go here
Place holder for today's Calendar update
Greenwich, UK 12/18/2024, 13:00:01 Europe/London
Object: Mars (open sky map)
RA 08h 33m 56.2s Dec +22° 12' 06.9" Appar J2000
Mag: -0.91 (Estimated: JPL) Const: Cancer
Sun Dist: 239,212,760 km [23.0 km/s]
Earth Dist: 105,597,795 km [8.9 km/s]
Martian Year:
38
Martian Astronomical Month:
1
Solar longitude Ls:
17.2
Sol number:
35
Offline
Like button can go here
===
Today on Mars: 0038/02/07 Saturday Days of the week offset 4 with Earth. (count from Mars to Earth )
Retrograde movement is under way. The sky trace is swinging back and upward at about 40 degrees using online protractor
Today on Earth: 2024/12/18 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: 38 Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees
===
Solar Longitude: 017.2 Sol Number: 035 Change in degrees is +.5 Julian date is: J0038035
Solar Longitude: 016.7 Sol Number: 034 Change in degrees is +.5 Julian date is: J0038034
Solar Longitude: 016.2 Sol Number: 033 Change in degrees is +.4 Julian date is: J0038033
<<#
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 http://www.planetary.org)
Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations. The calculations use tenths of hours. The Sun Distance needs to be captured at the moment the time increments to a given tenth.
Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun. Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.
===
Distance: Mars >> Sun per theskylive.com: 239,212,760 km [23.0 km/s] Difference is +157989 <= +6583 km/hour at 12 on 12/18 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 239,054,771 km [23.0 km/s] Difference is +158925 <= +6623 km/hour at 12 on 12/17 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 238,895,846 km [23.0 km/s] Difference is +159901 <= +6663 km/hour at 12 on 12/16 (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.
Note: Mars will go retrograde starting December 6, 2024 and continue through February 23, 2025.
=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth. Slant .005 degrees.
PGC 1668781 RA 08h 31m 49.2s – Day 0 Day 1 20 ahead
PGC 24021 above track on Day 0 RA 08h 33m 44.7s – Day 1 ahead Day 2 just above Mars – Day 3 22 past Day 4 41+
TYC 1398-1103-1 RA 08h 34m 1.8s – Day 0 – Day 1 34 hours ahead Day 2 abreast of Mars on inside Day 3 below Day 4 25+ Day 5 45+ Day 6 gone
====*====*>>>
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 5 and 6 minutes. Communications delay would be 10+ minutes round trip.
===
Earth Distance in km: 2024/12/18 105,372,000 (decreasing)
Earth Distance in km: 2024/12/17 106,213,000 (decreasing)
Earth Distance in km: 2024/12/16 106,988,000 (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) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in 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 35 is in Month 2 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 2 extends from Sol 29 through 56. <<== 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 35 is Saturday in the Proposed Business calendar for Mars. Sol 13 was a Skip Day on Mars. Next is near 50 of Year 38
##
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 2 of 24: Quarter 1 [Month 2-6] (This month has 28 Sols)
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Place holder for today's Calendar update
reenwich, UK 12/19/2024, 13:00:16 Europe/London
Object: Mars (open sky map)
RA 08h 33m 17.1s Dec +22° 17' 13.1" Appar J2000
Mag: -0.95 (Estimated: JPL) Const: Cancer
Sun Dist: 239,369,822 km [22.9 km/s]
Earth Dist: 104,902,603 km [8.8 km/s]
Martian Year:
38
Martian Astronomical Month:
1
Solar longitude Ls:
17.7
Sol number:
36
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===
Today on Mars: 0038/02/08 Sunday Days of the week offset 4 with Earth. (count from Mars to Earth )
Retrograde movement is under way. The sky trace is swinging back and upward at about 40 degrees using online protractor
Today on Earth: 2024/12/19 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: 38 Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees
===
Solar Longitude: 017.7 Sol Number: 036 Change in degrees is +.5 Julian date is: J0038036
Solar Longitude: 017.2 Sol Number: 035 Change in degrees is +.5 Julian date is: J0038035
Solar Longitude: 016.7 Sol Number: 034 Change in degrees is +.5 Julian date is: J0038034
<<#
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 http://www.planetary.org)
Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations. The calculations use tenths of hours. The Sun Distance needs to be captured at the moment the time increments to a given tenth.
Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun. Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.
===
Distance: Mars >> Sun per theskylive.com: 239,369,822 km [22.9 km/s] Difference is +157062 <= +6544 km/hour at 12 on 12/19 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 239,212,760 km [23.0 km/s] Difference is +157989 <= +6583 km/hour at 12 on 12/18 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 239,054,771 km [23.0 km/s] Difference is +158925 <= +6623 km/hour at 12 on 12/17 (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.
Note: Mars will go retrograde starting December 6, 2024 and continue through February 23, 2025.
=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth. Slant .005 degrees.
Next up: star TYC 1941-1113-1 RA 08h 31m 05.4s – Day 0 ahead 18.5
PGC 1668781 RA 08h 31m 49.2s – Day 0 Day 1 20 ahead Day 2 just below Mars
PGC 24021 above track on Day 0 RA 08h 33m 44.7s – Day 1 ahead Day 2 just above Mars – Day 3 22 past Day 4 41+ Day 5 still visible
====*====*>>>
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 5 and 6 minutes. Communications delay would be 10+ minutes round trip.
===
Earth Distance in km: 2024/12/18 105,372,000 (decreasing)
Earth Distance in km: 2024/12/17 106,213,000 (decreasing)
Earth Distance in km: 2024/12/16 106,988,000 (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) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in 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 36 is in Month 2 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 2 extends from Sol 29 through 56. <<== 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 36 is Sunday in the Proposed Business calendar for Mars. Sol 13 was a Skip Day on Mars. Next is near 50 of Year 38
##
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 2 of 24: Quarter 1 [Month 2-6] (This month has 28 Sols)
Offline
Like button can go here
Place holder for today's Calendar update:
Greenwich, UK 12/20/2024, 13:00:04 Europe/London
Object: Mars (open sky map)
RA 08h 32m 34.6s Dec +22° 22' 28.8" Appar J2000
Mag: -0.92 (Estimated: JPL) Const: Cancer
Sun Dist: 239,525,864 km [22.9 km/s]
Earth Dist: 104,228,848 km [8.7 km/s]
Martian Year:
38
Martian Astronomical Month:
1
Solar longitude Ls:
18.1
Sol number:
37
Offline
Like button can go here
===
Today on Mars: 0038/02/09 Monday Days of the week offset 4 with Earth. (count from Mars to Earth )
Retrograde movement is under way. The sky trace is swinging back and upward at about 40 degrees using online protractor
Today on Earth: 2024/12/20 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: 38 Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees
===
Solar Longitude: 018.1 Sol Number: 037 Change in degrees is +.4 Julian date is: J0038037
Solar Longitude: 017.7 Sol Number: 036 Change in degrees is +.5 Julian date is: J0038036
Solar Longitude: 017.2 Sol Number: 035 Change in degrees is +.5 Julian date is: J0038035
<<#
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 http://www.planetary.org)
Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations. The calculations use tenths of hours. The Sun Distance needs to be captured at the moment the time increments to a given tenth.
Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun. Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.
===
Distance: Mars >> Sun per theskylive.com: 239,525,864 km [22.9 km/s] Difference is +156042 <= +6502 km/hour at 12 on 12/20 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 239,369,822 km [22.9 km/s] Difference is +157062 <= +6544 km/hour at 12 on 12/19 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 239,212,760 km [23.0 km/s] Difference is +157989 <= +6583 km/hour at 12 on 12/18 (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.
Note: Mars will go retrograde starting December 6, 2024 and continue through February 23, 2025.
=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth. Slant .005 degrees.
Next up: Star in path: TYC 1941-1679-1 08h 29m 41.8s – Day 0
TYC 1941-1113-1 RA 08h 31m 05.4s – Day 0 ahead 18.5 Day 1 just above Mars
PGC 1668781 RA 08h 31m 49.2s – Day 0 Day 1 20 ahead Day 2 just below Mars Day 3 > 20 hours
====*====*>>>
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 5 and 6 minutes. Communications delay would be 10+ minutes round trip.
===
Earth Distance in km: 2024/12/20 104,063,000 (decreasing)
Earth Distance in km: 2024/12/19 105,372,000 (decreasing)
Earth Distance in km: 2024/12/18 106,213,000 (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) Minimum is about 56 million kilometers
Mars and Earth were in Opposition (Earth center) in December of 2022. The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth were in Conjunction (Sun center) in November of 2023.
Mars and Earth appear to have been as close as they will get in 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 37 is in Month 2 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 2 extends from Sol 29 through 56. <<== 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 37 is Monday in the Proposed Business calendar for Mars. Sol 13 was a Skip Day on Mars. Next is near 50 of Year 38
##
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 2 of 24: Quarter 1 [Month 2-6] (This month has 28 Sols)
Offline
Like button can go here