NGC 6888 Crescent Nebula (George Yendrey)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · NGC 6888 · PK076+01.1 · PK076+01.2 · PK077+02.1 · Sh2-105 · VdB130

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NGC 6888 Crescent Nebula

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NGC 6888 Crescent Nebula

From Wikipedia:The Crescent Nebula is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth[color=#c9c9c9]. [/color] It was discovered by William Herschel in 1792.[2] It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing 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.It is a rather faint object located about 2 degrees SW of Sadr (beyond the left edge of this image). For most telescopes it requires a UHC or OIII filter to see. Under favorable circumstances a telescope as small as 8 cm (with filter) can see its nebulosity. Larger telescopes (20 cm or more) reveal the crescent or a Euro sign shape which makes some to call it the "Euro sign nebula".

Crescent Nebula - Wikipedia

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Status	Advanced success
Started	...
Astrometry.net job	4984983
PixInsight job	R1D7T855EL5N991G2EDG0FWRE1XR446W
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h15m54s.840
RA (top/left)	20h19m50s.108
RA (top/right)	20h08m35s.792
RA (bottom/right)	20h12m07s.980
RA (bottom/left)	20h23m10s.251

Dec (center)	+38°54′09″.47
Dec (top/left)	+40°07′12″.17
Dec (top/right)	+39°06′39″.42
Dec (bottom/right)	+37°40′35″.89
Dec (bottom/left)	+38°40′01″.55

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NGC 6888 Crescent Nebula

NGC 6888 Crescent Nebula

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NGC 6888 Crescent Nebula

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