NGC6888 - The Crescent Nebula with a Colour Palette Twist (Robert Shepherd)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · HD192003 · HD192020 · HD192041 · HD192078 · HD192102 · HD192123 · HD192163 · HD192182 · HD192303 · HD192361 · HD192422 · HD192443 · HD192444 · HD192537 · HD228051 · HD228066 · HD228077 · HD228139 · HD228152 · HD228153 · HD228185 · HD228186 · HD228198 · HD228205 · HD228243 · HD228260 · HD228261 · HD228262 · HD228277 · And 20 more.

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NGC6888 - The Crescent Nebula with a Colour Palette Twist

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NGC6888 - The Crescent Nebula with a Colour Palette Twist

NGC6888 - the Crescent Nebula is a very commonly imaged target. This Nebula with the Wolf-Rayet star WR136 obviously has a high recognition value and very commonly is imaged in the HOO palette.
The Ha and O3 signal are strong in this target. Nevertheless, I decided to collect S2, too. It is much weaker but allows for a interesting colour mapping approach and I wanted to give this target another try this season using a rather unusual approach to colouration.
The basis is a dynamic combination described on thecoldestnights.com ("foraxX palette" https://thecoldestnights.com/2020/06/pixinsight-dynamic-narrowband-combinations-with-pixelmath/). I then combined this with the SHO normalisation by Bill Blanshan (AnotherAstroChannel https://www.youtube.com/watch?v=PpIOSSj4L5g).
The S2 data and the dynamic colour formulas lead to the distinct nebula, in front of a intense red Ha background. Furthermore, I added RGB stars.

Enjoy and CS
Robert

Imaged with N.I.N.A.
Reflecting Telescope Group
PixelSkiesAstro

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Status	Advanced success
Started	...
Astrometry.net job	7989598
PixInsight job	T99FCNA0UMP081Z1WUHEIG28RLVLH4DA
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h12m08s.935
RA (top/left)	20h09m40s.864
RA (top/right)	20h10m44s.923
RA (bottom/right)	20h14m35s.475
RA (bottom/left)	20h13m34s.361

Dec (center)	+38°21′18″.39
Dec (top/left)	+38°50′37″.95
Dec (top/right)	+37°43′30″.11
Dec (bottom/right)	+37°51′45″.80
Dec (bottom/left)	+38°59′02″.55

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NGC6888 - The Crescent Nebula with a Colour Palette Twist

NGC6888 - The Crescent Nebula with a Colour Palette Twist

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NGC6888 - The Crescent Nebula with a Colour Palette Twist

NGC6888 - The Crescent Nebula with a Colour Palette Twist

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