Celestia Forums

I was banging my head all the day with the orientation of some DSC model (using the Axis [ ] and Angles commands), believing it was all Equatorial coordinates, until I noticed that it's actually Ecliptic !? Can someone confirm this ?

Axis [...] are Ecliptic in the DSC declaration ? Is that right ??

Celestia's "universal" coordinate system, which is what is used for DSC orientations, is the same as Ecliptic J2000.

Thanks Selden.

Then I know exactly what to do. I just need to convert some Ra ; Dec coordinates to the Ecliptic system (and watch out for some axis flippings...).

Geez, all that time lost !

Is there a simple conversion tool on the net, which takes Equatorial coordinates and gives the Ecliptic coordinates ?

I just don't want to use the trigonometric formulas defined there (too long to use, after all that time lost for nothing) :

http://en.wikipedia.org/wiki/Ecliptic_coordinates

Cham wrote:Is there a simple conversion tool on the net, which takes Equatorial coordinates and gives the Ecliptic coordinates ?

I just don't want to use the trigonometric formulas defined there (too long to use, after all that time lost for nothing) :

http://en.wikipedia.org/wiki/Ecliptic_coordinates

How about placing this NASA URL into your bookmarks once for all ?

http://heasarc.gsfc.nasa.gov/cgi-bin/To ... nvcoord.pl

Fridger

Okay, I've found this nice conversion web page :

http://nedwww.ipac.caltech.edu/forms/calculator.html

Very usefull !

Cham wrote:Okay, I've found this nice conversion web page :

http://nedwww.ipac.caltech.edu/forms/calculator.html

Very usefull !

Did you see my post above yours??

Fridger

Nope. Cross posting.

Thanks for the link.