I just reprocessed an image of NGC 1499/California Nebula I captured in December of 2022 and January of 2023. Link and full details here:
NGC 1499 (California Nebula) HOO with RGB Stars
Above and to the left of Menkib are two bluish blotches that don't appear to be hot pixels, but look more like a comet. I don't have the subs handy right now, but they would appear to correspond to the two nights of imaging using the L-eXtreme filter, about a month apart. The object has moved, but a relatively short distance.
Here is a better view of them, circled in red. Apologies if this really is just hot blue pixels that got stacked/rejected oddly, but it really does look like the glow of a comet to me. Odd thing is, it doesn't appear in the broadband data (L-Pro) taken a few nights after the final L-eXtreme session, but that was just an hour of very short exposures for RGB stars, so perhaps it's too faint to show up there.
I tried Stellarium but couldn't find anything in that area, though I'm not a pro user. Is there anyone out there that could help me ID this object, or objects?
CS,
Mark
