Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  NGC 6888
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Crescent Nebula in Forax/SHO Blend, Pierre Fleurant
Crescent Nebula in Forax/SHO Blend
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Crescent Nebula in Forax/SHO Blend

Getting plate-solving status, please wait...
Crescent Nebula in Forax/SHO Blend, Pierre Fleurant
Crescent Nebula in Forax/SHO Blend
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Crescent Nebula in Forax/SHO Blend

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Description

Crescent Nebula NGC6888
Imaged on 2 evenings in two locations:
2023 10 12  Tupper Lake, NY;  OIII 1.7 hours; SII 2 hours
2023 8 15 Washington, ME;  Ha 2 hours; OIII 0.7 hours
Total: 6.4 hours

Used Foraxx palette; see https://thecoldestnights.com/2020/06/pixinsight-dynamic-narrowband-combinations-with-pixelmath/

From wikipedia:
The Crescent Nebula is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by William Herschel in 1792. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.

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Crescent Nebula in Forax/SHO Blend, Pierre Fleurant