Comet display incorrect?
Rolf Stadelmaier Dec 25, 2018
when I hunted about older comet images and diagnosed the comets position, I
experienced a never before seen incorrect display of the comet in Guide9.
I noticed that in case of comet Johnson (C/2015 V2 - 2017-05-17 22:34:48
UTC) Guide9 displayed the comets position with some offset and - and this was
what startled me - the tail showing in a total wrong direction in comparison to
Comparatively I find the display of comet 21P/Giacobini-Zinner (2018-08-16
21:15:24) in total accordance with my images.
To clarify what I found I uploaded some graphics here
Have others experienced such unexpected behavior of Guide9 too? And is
there a clearing explanation of this riddle?
Thanks for noticing,