Celestia Forums

Hello,
I was wondering how reliable orbits are in Celestia. There is a picture on JPL website here:
http://saturn.jpl.nasa.gov/multimedia/i ... ageID=1561
It is an alignment of Titan, Tethys and Saturn's F-ring as seen from Cassini, that I can get in Celestia with an amazing fidelity (set time to 2005.02.19 12:15 UTC, go to Cassini and look at Tethys) but Epimetheus is absent from the picture, lagging far far behind on its orbit...

Or the JPL is wrong and the middle moon is not Epimetheus but Pandora? The moon's position in the photograph seems more on Pandora's orbit than Epimetheus', and Pandora is quite close (yet not in the alignment), according to Celestia

What do you think? Is there some moon orbit tuning to do?

The orbits which are defined using CustomOrbit declarations are highly precise. They use ephemerides with many terms in the series expansions. The orbits defined using EllipticalOrbit are not. They're just simple Keplerian ellipses.

Celestia
!!!!

merci

Thanks for this explanation Selden

Terrier, je ne savais pas qu'on pouvais fournir un lien, c'est pas mal cette option

Cheers

samwwit wrote:Terrier, je ne savais pas qu'on pouvais fournir un lien, c'est pas mal cette option

Cheers

Yes cool innit ?8). This is Celestia's "CEL://url" feature. It works OK for Windows users, but it is not compatible with all O.S's /(browsers ?). I think it's MAC users who can't use the links directly.
When using Celestia, pess Ctrl c, or Ctrl Ins to save whats happening on your screen (at that instant), to your clipboard.

For loads more "CEL:url's", check out this thread. (Extra add-ons will have to be downloaded to view some of them correctly.)

cheers,
TERRIER