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Messier 53 and NGC 5053

Messier 53 and NGC 5053


Bortle 7 skies
Nikon D5600 camera
ISO 400
Astro-Tech AT102ED refractor, 714mm focal length, f/7
HoTech 2" SCA field flattener (1X)
iOptron CEM26 mount
30s x 201 frames (1h 40.5m)


Siril 1.2.0-beta2:

Crop to 5200 x 3500px
Photometric color calibration
Background extraction
Modified asinh transformation
Generalized hyperbolic transformation
Black point

RawTherapee 5.8:

L*a*b chrominance related to luminance curve
Luminance noise reduction
Defringe tool

GIMP 2.10:

Luminance curve

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