Wednesday, November 12, 2014
Comet 67P/Churyumov–Gerasimenko in Celestia
As usual, I have been trying to make a Celestia file for comet 67P.
And failing miserably. I tried to convert the ESA public shape model to celestia 3Ds format and failed miserably. So I ended up using Jack Selden's Rosetta files, with a surface map taken from this thread on the Celestia. The Celestia comet looks nothing like the rubber duck shape of 67P, but until some kind person points me to a pubic Celestia shape model that is what I am stuck with.
I utterly failed to make any of the XYZ orbital files work for me, so I just copied the orbit of Dactyl around Ida. Yes, that's cheating, but after days of frustration I wanted something that works. If you want a stunning Celestia simulation, go here.
As usual, copy the code below and save as it as a text file 67P.ssc in the Celestia extras folder.
# Taken from Jack Seldens 67P ssc file
# Created By Ian Shazell, Spacecraft Analyst for Rosetta
# On Behalf of the European space Agency, www.esa.int
# Comet 67P Churyumov-Gerasimenko, Celestia SSC file. www.shatters.net/celestia
Texture "67p720x361.png" # texture from the Celestia forum from John Van Vliet
Radius 1.98 # http://forum.celestialmatters.org/viewtopic.php?f=4&t=690
Mesh "rosetta.3ds" # rosetta model http://homepage.eircom.net/~jackcelestia/files/rosetta.zip
Epoch 2449228.2028 # Using orbit of Dactyl around Ida
Period 0.96534 #
SemiMajorAxis 25.0 # Why? I can't make anything else work
Eccentricity 0.13 #
LongOfPericenter 310 #
AscendingNode 90 #
Inclination 8 #
and the texture file