Perseid passing close to M31, with a dim satellite in the frame.
North is to the top of the frame, which is a very small crop from a full-frame ASI6200MC. 6 second exposure, with 10 dB gain. Lens is a Samyang XP-50 opened up wide completely to f/1.2 . The camera is only cooled down to +10ºC because the exposures are so short.
Completely untracked and unguided, with camera pointed at a fixed point in the sky 30 minutes east of Meridian, at declination of +48º.
Bortle 5 to 6. IDAS HEUIB-II filter. Image tweaked using macOS Preview.app -- no dark frame or flat frame calibration.
Chen
