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NGC 869 and NGC 884 (Double Cluster)

NGC 869 and NGC 884 (Double Cluster)


Bortle 7 skies
Nikon D5600 camera (unmodified)
ISO 200
Astro-Tech AT102ED refractor, 714mm focal length, f/7
HoTech 2" SCA field flattener (1X)
iOptron CEM26 mount
30s x 249 frames (2h 4.5m)


Siril 1.2.0:

Crop to 5000 x 3600px
Photometric color calibration
Background extraction
Star desaturation
StarNet++: modified asinh stretch (several times), histogram adjustment

GIMP 2.10:

Luminance curve

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