NGC6888 - The Crescent Nebula (Adrian Webster)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: 28 Cyg · 28 b02 Cyg · 34 Cyg) · 34 P Cyg · Crescent Nebula · HD191024 · HD191045 · HD191176 · HD191225 · HD191257 · HD191290 · HD191396 · HD191397 · HD191424 · HD191472 · HD191473 · HD191703 · HD191720 · HD192003 · HD192020 · HD192041 · HD192078 · HD192079 · HD192102 · HD192123 · HD192163 · HD192182 · HD192303 · HD192361 · HD192422 · And 57 more.

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NGC6888 - The Crescent Nebula

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NGC6888 - The Crescent Nebula

The main target for me last night (or rather this morning). I had to wait until 0100hrs before the nebula cleared my garage and became visible. So I only got two hours exposure on it before it became to light. The joys of summer astronomy I suppose! The Crescent Nebula is an emission nebula in the constellation Cygnus, about 5000 light-years away. It was discovered by Friedrich Wilhelm Herschel in 1792. It is formed by the fast stellar wind from the Wolf-Rayet star, WR 136, colliding with and energising 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. The WR 136 is nearing the end of its life and is expected to explode as a supernova within a few hundred thousand years. Processed in the Hubble palette as there was just too much Ha, and the whole image would look too red.

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Unknown

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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
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	9839584
PixInsight job	5YI7IM7UOWDQRJ51W1LLWQXW27Y7SW30
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h12m25s.50
RA (top/left)	20h20m53s.16
RA (top/right)	20h16m19s.95
RA (bottom/right)	20h03m46s.16
RA (bottom/left)	20h08m40s.73

Dec (center)	+38°26′47″.8
Dec (top/left)	+37°40′39″.4
Dec (top/right)	+40°07′03″.3
Dec (bottom/right)	+39°10′28″.7
Dec (bottom/left)	+36°45′58″.2

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NGC6888 - The Crescent Nebula

NGC6888 - The Crescent Nebula

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NGC6888 - The Crescent Nebula

NGC6888 - The Crescent Nebula

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