Crescent Nebula - HOO (James E.)

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

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Crescent Nebula - HOO

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Crescent Nebula - HOO

Some elongated stars in the corners due to a slightly off spacing imaging train.

Taken over multiple nights:

Ha - June 22, 26; July 1, 2, and 8.

OIII - June 29, 30; July 3 and 8.

The Crescent Nebula, NGC 6888, is 25 light years across and is about 5000 light years from Earth in the constellation Cygnus. The nebula’s central star is classified as a Wolf-Rayet star (WR 136) - very hot with a high rate of mass loss. The star is shedding its outer envelope in a strong stellar wind, ejecting the equivalent of the Sun’s mass every 10,000 years. The nebula’s complex structures are likely due to the strong stellar wind interacting with material ejected in an earlier phase. The central star is near the end of its stellar life and should ultimately go supernova.

Credit: APOD June 10, 2016

Original
B
Final
C

B

Description: Boosted OIII sllightly

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C

Description: Reprocess with starless version then combine with RGB image

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Narrowband imaging
Images from the EdgeHD Series
Schmidt-Cassegrain Telescope (SCT) Imagers
NOVAC
ZWO ASI1600MM/QHY163M

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Status	Advanced success
Started	...
Astrometry.net job	3693010
PixInsight job	BJEBTYIDQ5S9JYYRABS5EOD5NN8OGRRJ
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h12m08s.739
RA (top/left)	20h11m10s.819
RA (top/right)	20h11m12s.644
RA (bottom/right)	20h13m06s.294
RA (bottom/left)	20h13m05s.244

Dec (center)	+38°21′21″.88
Dec (top/left)	+38°36′47″.34
Dec (top/right)	+38°05′42″.15
Dec (bottom/right)	+38°05′54″.36
Dec (bottom/left)	+38°36′59″.99

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Crescent Nebula - HOO

Crescent Nebula - HOO

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Crescent Nebula - HOO

Crescent Nebula - HOO

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