NGC 6888 Crescent Nebula in HOO (Girish Muralidharan)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · NGC 6888 · Sh2-105

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NGC 6888 Crescent Nebula in HOO

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NGC 6888 Crescent Nebula in HOO

Have always wanted to image NGC 6888 at higher focal length to try and get some details.. this is my first attempt at this with 1.5x extender on TSA 120 at 1350mm FL. While i'm happy with how it turned out, the quest will continue to bring out more detail and perhaps add more data as well..

The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by William Herschel in 1792.[2] 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[3] to 400,000[citation needed] 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.

Milwaukee Astronomical Society

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Status	Advanced success
Started	...
Astrometry.net job	4993296
PixInsight job	PSPFVG1J7SJ2ZQC71Y6POXH58XR55SH9
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h12m09s.931
RA (top/left)	20h13m37s.900
RA (top/right)	20h10m41s.874
RA (bottom/right)	20h10m43s.272
RA (bottom/left)	20h13m37s.447

Dec (center)	+38°20′34″.34
Dec (top/left)	+38°33′44″.60
Dec (top/right)	+38°33′30″.38
Dec (bottom/right)	+38°07′20″.30
Dec (bottom/left)	+38°07′34″.80

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NGC 6888 Crescent Nebula in HOO

NGC 6888 Crescent Nebula in HOO

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NGC 6888 Crescent Nebula in HOO

NGC 6888 Crescent Nebula in HOO

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