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Crescent nebula: bicolor nebulosity with RGB stars

  • Posts: 300
  • Thank you received: 57

Crescent nebula: bicolor nebulosity with RGB stars was created by Scott Denning

Trying out new hardware & processing. NGC 6888 over two weeks in September (~ 12 hr exposure) dodging choking smoke and even two nights of snow!

Borg 125SD with ASI1600 MM Pro on iOptron CEM40EC guided with Kowa scope and ASI290 mini
Captured in KStars/Ekos on Rasp Pi running ubuntu-mate 20.04

33x600s Ha, 34x600s O3, 10x60s R, 10x60s G, 10x60s B

Processed Ha and O3 following C Foster workflow: MureDenoise, Deconvolution
PixelMath combination of NB data following thecoldestnights.com/2020/06/pixinsight-...ions-with-pixelmath/

R = Ha
G = ((Oiii*Ha)^~(Oiii*Ha))*Ha + ~((Oiii*Ha)^~(Oiii*Ha))*Oiii
B = Oiii

StarNet++ to create starless NB image of nebulosity

PixelMath combination of RGB stars with starless NB image:
RGB/K = max(stars, (starless ^ ~starless)

The following user(s) said Thank You: Jim, Andrew Burwell
Last edit: 3 years 7 months ago by Scott Denning.
3 years 7 months ago #60062
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