'Hyperbolic' comets off?

johnonj Aug 22, 2011

Hi,

Maybe I have done something silly, but I cannot get Comet Garradd C/2009 P1 to be in its correct position. It shown in Hydra (near the Head of Hydra) on the 13 Aug 2011 version, instead of Sagitta where it is now.

I have downloaded new elements. My home planet is Earth. The date is set to 23rd Aug 2011 at 0 UT. J2000.0 coordinates.

By the way, its eccentricity is shown as 1.0010110. Another comet with ecc > 1: LINEAR C/2010 S1 shows as its position in Cen instead as Cas.

Other smaller ecc comets are shown ok. Perhaps this is the reason?

John