1-Are the radius imaginary, in your ssc file ?
As the comments in the ssc file imply, the radius values were calculated by dividing by two the diameter values estimated by the discoverers. I don't know how accurate their estimates are.
2-Are the new moons the same as 2002 N1, 2002 N2, 2002 N3 and 2002 N4 ? I mean, is there a difference, say, between S_2002 N1 and 2002 N1 ?
The official designations of these satellites are "S/2002 N1" through "S/2003 N1". Since Celestia doesn't like the use of "/" in an object name, I substituted an underscore "_". Omitting the "S/" entirely would have been another option, so I presume they're supposed to be the same bodies.
By the way, there's a Radius error in your ssc for the moon S_2003 N1.
oops. sorry. fixed.
Which one is supposedly more accurate ?
Does your minormoons.ssc say where its values came from?
I used the values specified in the official "
Minor Planet Electronic Circulars" for the bodies. I listed the URLs of those circulars in the SSC file. The values in the circulars are slightly different from the values shown on the "satellites" page of one of the discoverers at the University of Hawaii, but the Web page doesn't say how its values were obtained. The values in the circulars were calculated by Brian G. Marsden from the observations listed in the circulars. Brian does those calculations for all minor planet discoveries, and is well known for the accuracy of his work. There was even a revised circular issued for S/2003 N1 with updated parameters, which is what I used.
