NGC 6888 - Crescent Nebula (Paul Ricker)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · HD192020 · HD192163 · HD192182 · HD192303 · HD228243 · HD228304 · LBN 203 · NGC 6888 · Sh2-105

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NGC 6888 - Crescent Nebula

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NGC 6888 - Crescent Nebula

NGC 6888, the Crescent Nebula, is a large bubble blown by the Wolf-Rayet star WR 136. This massive post-main sequence star is blowing away matter from its outer layers at a prodigious rate (perhaps 10^-4 solar masses per year) and will probably die as a supernova in a few hundred thousand years.

It's much better than my previous attempts at this object, but the extended region of OIII emission seems to be a challenge. Using a new camera with a larger chip on the AT8RC. Despite (as far as I can tell) good collimation, I'm seeing distorted stars in the corners that I have to crop. Will see soon whether a field flattener helps.

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Description: Blended original with a 4x4 binned version with more star reduction.

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Status	Advanced success
Started	...
PixInsight job	PLXM8Q6K8PHSMJUA8FUQQ7RXSPDK8YCX
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h12m10s.208
RA (top/left)	20h13m16s.278
RA (top/right)	20h12m28s.463
RA (bottom/right)	20h11m03s.991
RA (bottom/left)	20h11m52s.930

Dec (center)	+38°20′20″.77
Dec (top/left)	+38°13′29″.33
Dec (top/right)	+38°34′34″.22
Dec (bottom/right)	+38°27′09″.76
Dec (bottom/left)	+38°06′07″.69

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NGC 6888 - Crescent Nebula

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