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Stellarium / stellarium-web-engine

JavaScript planetarium engine
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Incorrect minor planet locations (ex: Ceres) #179

Open johnarban opened 1 year ago

johnarban commented 1 year ago

Stellarium-Web gives the incorrect position of Ceres & other minor planets.

I confirmed this by looking at it's position for the same time (20:40 UTC-4 (EDT) Mar 26 2023) on theskylive.com. There is also a discrepancy for Vesta.

JPL Horizons places Ceres at 

2023-Mar-26 00:44 (UTC)
(actual)
RA: 12 23 51.90 DEC: +15 47 18.2   
(apparent)
RA: 12 25 03.25 DEC +15 39 30.4

Not at a declination of ~16 as shown in the web app.

Stellarium Desktop (towards M100)

image

Stellarium Web (towards M100)

image

The issue could be related to using an out of date version of mpcorb.dat. But I don't know how often that is updated here. But I do see that the version it in /apps/test-skydata/mpcorb.dat is 2 years old.

GildedHonour commented 1 year ago

@johnarban how have you managed to run it at all? Do you run it as a vue application?

I've had to cut off all the stuff related to Vue in apps/simple-html and only after this would it run, but the bottom panel with the buttons had to be removed too.

johnarban commented 1 year ago

Hi, this is based off using the version at stellarium-web.org. I haven't run this standalone. Perhaps this repo isn't the correct place for this issue?

GildedHonour commented 1 year ago

Why "standalone"? That's an html page with a wasm component in it, which is stellarium web engine.

If not the repo, where else?

johnarban commented 1 year ago

Sorry - I meant that I have not tried to run this locally. I haven't done any development on this project - I was simply noting the issue.