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Draco Trio (or Triplet)

Draco Trio (or Triplet)

Mostly through smoky/hazy skies from Canada fires


Bortle 7 skies (under good conditions)
Nikon D5600 camera
ISO 200
Astro-Tech AT102ED refractor, 714mm focal length, f/7
HoTech 2" SCA field flattener (1X)
iOptron CEM26 mount
30s x 383 frames (3h 11m)


Siril 1.2.1:

Crop to 4000 x 3000px
BQ Octantis' technique of white balance, background subtraction, and histogram conditioning
Background: modified asinh transformation (6X), histogram adjustment, saturation
Stars: modified asinh transformation (5X), synthetic blue (from red and green), saturation

RawTherapee 5.9:

L*a*b* CL curve (to reduce background chroma noise)
Luminance noise reduction

GIMP 2.10:

Luminance curve

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