This image of open cluster NGC 1746 in Taurus was taken at 8:18 pm on one of the first chilly nights in the fall - November 27, 2024. The session started at 7:24 pm and ended at 8:58 pm due to cloud cover. The outdoor temperature was 3°C. Red dots/streak were observed in the image shown by the arrow. I didn't notice this at first but when I did, I sent Celestron Tech Support the image and they explained to me it was a hot pixel. The cause of hot pixels is found in the FAQ sheet on their website. I quote
"If you notice some red “hot pixels” or other image artifacts, we recommend using “Recapture Dark Frames” in Menu>Settings>Advanced. The dark frames stored on Origin were taken at the factory and may not perfectly match your current observing conditions (i.e. temperature). Capturing the dark frames in the same conditions you are imaging will better eliminate any residual hot pixels or artifacts. NOTE: Be sure to install the dust cover on Origin before recapturing dark frames, we also recommend doing this outside at night, or in a dark room, and covering the entire optical tube with a towel or blanket to block any stray light."
I decided not to recapture dark frames for several reasons: (1) I do not want to adversely affect my long term studies (ex. variables) by changing any of Origin's factory settings, (2) What if I make a mess that is far worse?, and (3) I want to see if these hot pixels will self-repair once the warmer summer nights return. Furthermore, if I did recapture dark frames, what temperature do I use and, is this problem going to keep recurring every winter?
In the following section I am going to post a consistent capture of a star field I can see year round to monitor changes in the hot pixels/streaks. I have chosen 5 Ursae Minoris with 10-sec exposures, 10-minute total integration time, no filter, and no post-processing.