NGC 6811 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: NGC 6811

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NGC 6811

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NGC 6811

This object is an open star cluster located 3000 light years away in the constellation of Cygnus. It consists of about 250 stars scattered across a circular area about half the size of the full moon.

It is categorized as a Trumpler type III 1 r cluster, which means that it is a rich, fairly loose collection of equally bright stars. It has been described in various ways, including "Hole in a Cluster", "Smoke Ring" and "Star Clover". To me, a more appropriate description would be "The Dark Cross", since I see a dark area roughly in the shape of a "+" at the center of the object.

All of the cluster stars are fairly dim, so whatever you want to call it, it is not a spectacular cluster in my book. The bright nearby collection of stars, partially seen at the bottom of the image, is a more obvious and attractive sight to me than NGC 6811, but I don't believe that it has a designation.

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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.

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Status	Advanced success
Started	...
Astrometry.net job	2087851
PixInsight job	T5488IAG234C660BYWP68QAARQTRO8CI
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	19h37m11s.992
RA (top/left)	19h38m56s.294
RA (top/right)	19h39m32s.978
RA (bottom/right)	19h35m25s.833
RA (bottom/left)	19h34m53s.105

Dec (center)	+46°21′39″.75
Dec (top/left)	+45°52′22″.75
Dec (top/right)	+46°46′04″.92
Dec (bottom/right)	+46°50′50″.29
Dec (bottom/left)	+45°57′03″.87

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