While I was imaging C/2019Y4 last night I noticed a fuzzy trail on stacked images. I have been unable to get a response from the Minor Planet Checker, I just get error messages, so probably my inputting error. Could any kind soul please check the comet field for me last night around 0200h UT? Many thanks David
Hi David, the fuzz is almost certainly a ghost of the bright star at the center of the frame. I had a similar fuzz appear on a sequence of one of my comet image runs. After I had done astrometry on the fuzz and sent it to Nick James he ran the astrometry though FindOrb and the result was an ludicrous earth orbit object. So I suspect your fuzz will be the same, a ghost image of the bright star. Nice image of the comet though, please send it to me for the BAA Comet Archive. Denis
Thanks David, I have had peculiar analemma type trails on hyperstar images before but this one was a very regular motion between each successive image. However, when you actually look at the artifact close up it shows a spiked appearance, so other than a Klingon starship it must have been a ghost image from that bright star!