Problems with 2013 XY8

aje160744 Dec 8, 2013

For some reason the Nov 15 version does not seem to like 2013 XY8. 


I am using the first 56 obs of this object (as of 20:00 UT on 8th Dec). The Nov version comes up with an almost identical orbit as my 2012 July 29 version but:

The Nov 2013 version refuses to detect the 11th Dec close approach (even though it is clearly shown in the delta figures for that day).
The Nov 2013 version will not produce any ephemeris for dates more than a few weeks in the past.

The 2012 version does not have either of these problems.

Tony