Rolf Stadelmaier Dec 26, 2018
Recently came across this strange event. Have been a Guide user
Am using the current comet.dat file updated from within Guide 9.
46P Wirtanen displays in proper position. However a second position also
displays some 20+ degrees to the SW ... If the original position is
moved out of the field of view.
Example. Today date/time 20181225 20:25 CST.
Set display view to 20 deg field and center on nu PER. The 46P
position will display about two deg east of that position. Zoom out to
a larger field, say 45 deg , where the correct position of 46P will be
shown. If the file of view is large enough to display both positions at
the same time, the comet position just east of nu Per is no longer
If the field of view is smaller as to only display one of these
positions at a time, going to either position will show the comet
plotted in two different places.
There is only one orbit data set listed in the comet file. However, if
you click on 'More Info' on each of the comet positions displayed, the
elements set displays different parameters. I've not been able to see
this with any other comet except 46P.
Anyone else able to verifiy this second position being displayed or
explain why this is happening?