NGC 6888 Crescent Nebula (Edward Overstreet)

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

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NGC 6888 Crescent Nebula

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NGC 6888 Crescent Nebula

The Crescent Nebula, NGC 6888 or Caldwell 27, is an emission nebula in the constellation Cygnus.

About 4,700 light years away, NGC 6888 is formed by a fast stellar wind from the Wolf-Rayet star HD 192163, also known as WR 136. The star is shedding its outer envelope, ejecting the equivalent of the Sun's mass every 10,000 years. This stellar wind is colliding with, and energizing, a slower-moving wind ejected by the star when it became a red giant around 400,000 years ago. The result of the collision is a shell about 25 light-years across. Two shock waves, one moving outward and one moving inward, heats the stellar wind to X-ray-emitting temperatures. The central star WR 136 will probably undergo a supernova explosion sometime in the next million years.

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Schmidt-Cassegrain Telescope (SCT) Imagers

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Status	Advanced success
Started	...
Astrometry.net job	4049562
PixInsight job	QK7RI29BYZZHHGXVR05O417UCGQL76BE
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h12m11s.619
RA (top/left)	20h14m07s.346
RA (top/right)	20h11m12s.529
RA (bottom/right)	20h10m16s.205
RA (bottom/left)	20h13m10s.170

Dec (center)	+38°19′53″.46
Dec (top/left)	+38°24′47″.95
Dec (top/right)	+38°39′59″.37
Dec (bottom/right)	+38°14′53″.10
Dec (bottom/left)	+37°59′44″.98

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NGC 6888 Crescent Nebula

NGC 6888 Crescent Nebula

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NGC 6888 Crescent Nebula

NGC 6888 Crescent Nebula

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