Stacked a ton of data from the last month, and I noticed a big shadowy line across one portion of the image. Pic here:
If you Blink through my subs, you can see the spot move "across" that line as the night goes by. It repeats the next night, and starts and ends in the same places. So that's why it made that line across the image. Kinda like an animation flip book, where it moves a little each page and creates the illusion of movement. Did the same thing across at least 5 or 6 nights of imaging, over the course of a month. I feel like I'm not explaining it very well, so here's a video of the spot moving in Blink, through the course of one night's imaging, then back to the start.
(You'll probably have to download this .mov file - it plays at extremely low quality when you stream it from Dropbox)
Same mount location each night, etc. It's in the raw subs, calibrated, and registered subs. Is this some kind of reflection caused by a dust mote or something on the front element? I'm completely puzzled by why it moves across the frame as the night goes by. So obviously flats didn't take care of it, since it moves in each frame. Oh, and this happens in all my LRGB filters.
Edited by stream41, 23 June 2022 - 10:56 PM.