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tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,460

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

Place holder for today's Calendar update:

Greenwich, UK 11/28/2024, 13:00:00 Europe/London
Object: Mars   (open sky map)
RA 08h 34m 50.6s Dec +21° 12' 28.7" Appar J2000
Mag: -0.43 (Estimated: JPL)  Const: Cancer
Sun Dist: 235,884,108 km [23.3 km/s]
Earth Dist: 123,005,715 km [11.9 km/s]

Martian Year:   
38
Martian Astronomical Month:   
1
Solar longitude Ls:   
7.6
Sol number:   
15

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,460

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

===
Today on Mars: 0038/01/15 Sunday Days of the week offset 3 with Earth.  (count from Mars to Earth ) << First skip day of Year 38

Today on Earth: 2024/11/28 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: 007.6 Sol Number: 015  Change in degrees is +.5 Julian date is: J0038015
Solar Longitude: 007.1 Sol Number: 014  Change in degrees is +.5 Julian date is: J0038014
Solar Longitude: 006.6 Sol Number: 013  Change in degrees is +.5 Julian date is: J0038013 << First skipdayonmars for Year 38
<<#

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:   235,884,108 km [23.3 km/s] Difference is +175018 <= +7292 km/hour at 12 on 11/28 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   235,709,090 km [23.3 km/s] Difference is +175753 <= +7323 km/hour at 12 on 11/27 (time 12:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   235,533,337 km [23.3 km/s] Difference is +176485 <= +7354 km/hour at 12 on 11/26 (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 1645989 and 1645577 Day 0 – Day 1  30  Day 2  50 – Day 3  30 ahead – Day 4 – under Mars
TYC 1398-1042-1 RA 08h 32m 6.6s – Day 0 – Day 1 About 30 ahead – Day 2 just ahead  – Day 3  15 – Day 4  30 – Day 5 57 hours past
====*====*>>>

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: 2024/11/28 122,851,000 (decreasing)
Earth Distance in km: 2024/11/27 123,837,000 (decreasing)
Earth Distance in km: 2024/11/26 124,789,000 (decreasing)
#>

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

Maximum Earth-Mars distance is estimated to be 401 million kilometers (both at apogee and opposite vs Sun) 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 15 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 15 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 1 of 24: First month of Quarter 1 and first month of Mars Year 38