Twice now I've experienced this white glow coming from the right hand side of my frames. In the image below, you can see I've used Automatic Background Extraction, and applied a quick stretch. I'm able to process it out using DBE, but I'm sure I'm losing some data in those areas.
I've had this camera for a year, and never experienced this issue, so I don't know how to explain it. For the most part, I've not imaged for longer than 120s previously due to the amount of light pollution I have in my area (red zone). But I got an IDAS LPS P2 filter which has allowed me to image for longer (3 min subs).
I normally image at -20 degC but the last two imaging sessions I did at -15 degC because it seemed like the cooler was having trouble getting down to -20 and holding it there. It's pretty warm here right now with high 80 degF in the evenings. So that would be the only commonality between imaging sessions, however, I've made proper darks, which didn't seem to remove the glow. It's possible this glow is from the Moon, but I don't know how that translates into the images. The moon was quite bright towards the later part of my imaging session.
I'm hoping someone here can provide some insight into the issue I'm facing.
Also, if you see anything else I could do differently based on my light pollution, I'd love some suggestions. If anything, I think 3 min subs might be pushing it.