M42: Orion Nebula
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Details:

Location: Southern California
Bortle Class: 9 - city
Scope: Nexstar 8SE 8" SCT
Camera: Sony a6400 DSLR
ISO - 1600
Exposure - 307 10” light frames, about 75 calibration frames darks/flats/biases
Stacked in SIRIL: SINBAD M42 photometric color calibration, PS noise
Links: Astrobin //