Quote:
Originally Posted by mithrandir
I tried generating a 3D plot with gnuplot from JPL ephemeris for the two. This is the closest they appear to get. They cross at close to 90° - Mars moving in RA, C/2013 A1 moving in Dec.
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That's a very cool graphic Andrew - I like it!
That looks about right using the MPC/JPL ephemeris, but my link a few posts ago is to a blog post by Leonid Elenin in which he states he has made new calculations including a further 6 days of observation arc.
These have not been published at the MPC yet, which is where the JPL data comes from.
Carl