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ZWO ASI183MC camera and UV/IR cut filter on a RedCat51 astrograph/iEXOS 100 mount
Subs (23 3-minute, guided) plus calibration frames were stacked with DeepSkyStacker. Post-processing used Siril, Starnet++, Photoshop and Microsoft Photo.
Messier 37 is a bright and densely packed open star cluster in the constellation Auriga. This beautiful deep sky object contains over 500 stars and is about 4,500 light years from Earth.