NGC 6888 Crescent Nebula (jdowning)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · HD192163 · HD192182 · HD192303 · HD192361 · HD192444 · HD192537 · HD228243 · HD228304 · HD228376 · HD228409 · HD228410 · HD228411 · HD228424 · LBN 203 · NGC 6888 · Sh2-105

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NGC 6888 Crescent Nebula

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NGC 6888 Crescent Nebula

The Crescent Nebula is an emission nebula in the Sadr region. It is formed by the fast stellar wind from the collision of Wolf-Rayet WR136 and the slower moving wind ejected by the star when it became a red giant. This collision results in a shell and two shock waves; one moving inward and one moving outward.

The subs for this image were captured in mid June 2022 using 600 second exposures unbinned. I have one other Crescent Nebula posted. That one was done in September 2020 with a CDK17 and FLI KL4040 camera using only the high gain channel.

This image is the product of an excellent collaboration with Bray Falls. In early 2020 we started working together. Bray is an outstanding Pixinsight expert who helped me come up to speed on a basic working knowledge of Pixinsight. It became quickly clear that my time was best spent on image capture and optimizing the equipment and software. Bray would work on post processing using Pixinsight, Photoshop, BXT and other software tools. I'd add a bit of LightRoom processing from time to time. I'm really pleased with the results from this collaboration which has only gotten better and better.

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Status	Advanced success
Started	...
Astrometry.net job	6894649
PixInsight job	B11X22FQB1X2H5C9D47FU2V8U4C57MIW
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h12m46s.893
RA (top/left)	20h14m05s.517
RA (top/right)	20h11m28s.422
RA (bottom/right)	20h11m28s.680
RA (bottom/left)	20h14m04s.976

Dec (center)	+38°18′59″.37
Dec (top/left)	+38°29′13″.72
Dec (top/right)	+38°29′16″.11
Dec (bottom/right)	+38°08′41″.97
Dec (bottom/left)	+38°08′39″.54

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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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