jestr wrote:OK the new XYZ file I made for Cassini was downloaded using Horizons Telnet service with orbit sample points every 4 hours usually but every 5minutes for every flyby (except those of Saturn).When I replayed the whole xyz in Celestia however I noticed that many times Cassini would go straight through the moon ( Titan).So for these occasions I changed the xyz using Toti's XYZ builder script.The flybys I adjusted are as follows
2005 September 7th Titan flyby
2006 September 7th Titan flyby
2006 October 25th Titan flyby
2007 Jan 29th Titan flyby
2007 February 22nd Titan flyby
2007 March 10th Titan flyby
2007 March 25/26 Titan flyby
2007 April 10/11 Titan flyby
2007 April 26th Titan flyby
2007 May 12th Titan flyby
2007 Jun 13th Titan flyby
All the others are as downloaded from Horizons ,I havent got xyz orbits for the moons (though it is quite possible for a period of a few years I guess),so I havent checked how much the moon orbits are out,but I dont think its by too much.Hope this helps.Jestr
Are these corrections needed because of inaccuracies in the Celestia Titan orbit? I also wonder if similar corrections would be needed for other moons? I also assume that your xyz files are available on the Celestia motherlode as mentioned in other posts.