Orientation of Jupiter, Uranus and Venus may be incorrect or displaying az/alt wrong

Bug #1637417 reported by Steve on 2016-10-28
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Stellarium
Low
gzotti

Bug Description

If you look at this webpage
http://aa.quae.nl/en/reken/zonpositie.html
There is a table under section "15. Comparison with planetary programs" (In middle of the page)which shows comparisons for the azimuth and h altitudes between diff programs.
I went through both tables and noticed Venus, Uranus and Jupiter for stellarium 0.15 varied largly from results of what other programs were showing which generally matched each other by about a degree or 180deg which was predictable.
I verified that stelarium .15 showed the results the table showed.

I also noticed when comparing Jupiter Az/alt from version.14.2 Stellarium and .15 stellarium the results were different for az/alt which seemed odd given that other planets matched between version .14.2 and .15
So it could be just a az/alt info display error or something more serious.

Alexander Wolf (alexwolf) wrote :

What is the relationship of planetographic coordinates of planets and orbits of these planets?

Changed in stellarium:
status: New → Incomplete
Steve (suecke) wrote :

Hi,
I only know that AA in the table results are planetocentric. I dont know about the others programs including stellarium and what they use.
Which ever Stellarium uses I would think the results would still be at least close to the the other programs results.
The other planets besides specifically Jupiter, Uranus and Venus if they are planetographic in stellarium they were still close to the other programs results so they were in my mind ok.
Maybe Jupiter, Uranus and Venus has more flattening then the other planets? I dont know. I didnt think so to the degree they would effect the numbers so much.
I attached a pic of my comparisons of the tables.
I hope it helps somewhat.
I color shaded and converted to decimal and connected values which should be similar.
Iam ignoring redshift 3 results and putting in that area the result of adding 180 to the AA values.
When I did these comparisons,the issues with Jupiter, Uranus and Venus became noticable.
Pluto may be off to compared to others but my study was incomplete
Sorry about neatness of the table comparisons I was not expecting to show to anyone.

gzotti (georg-zotti) wrote :

Planet axis orientation in space is due to undergo a major revision, hopefully soon. The table may become helpful for comparison, thanks.

summary: - orbits of Jupiter, Uranus and Venus may be incorrect or displaying
+ Orientation of Jupiter, Uranus and Venus may be incorrect or displaying
az/alt wrong
Changed in stellarium:
assignee: nobody → gzotti (georg-zotti)
status: Incomplete → Confirmed
importance: Undecided → Low
gzotti (georg-zotti) on 2017-10-01
Changed in stellarium:
status: Confirmed → In Progress
milestone: none → 1.0.0
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