Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent nebula  ·  NGC 6888
NGC 6888 - Crescent Nebula [Bicolor], jdifool
NGC 6888 - Crescent Nebula [Bicolor]
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NGC 6888 - Crescent Nebula [Bicolor]

NGC 6888 - Crescent Nebula [Bicolor], jdifool
NGC 6888 - Crescent Nebula [Bicolor]
Powered byPixInsight

NGC 6888 - Crescent Nebula [Bicolor]

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Description

The following PixelMath Expressions were used to generate the bicolor channel combination:

R: iif(Ha > .15, Ha, (Ha*0.8)+(OIII*0.2))

G: iif(Ha > 0.5, 1-(1-OIII)*(1-(Ha-0.5)), OIII *(Ha+0.5))

B: iif(OIII > .1, OIII, (Ha*0.3)+(OIII*0.2))

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NGC 6888 - Crescent Nebula [Bicolor], jdifool