ic 5146, cocoon nebula,

IC 5146 - The Cocoon  Nebula


LRGB 100 80 80 80

Tele Vue NP 127fli

ASA DDM 60 Pro

FLI ML 16200


Constellation Cygnus

Ra 21:53:24.00

Dec +47:16:00.1


The cocoon region, well known in astrophotographic circles, was first mentioned in 1905 by E. Barnard, who discovered this object on photographs in 1893. IC 5146 is a  nebula with an embedded open star cluster in the constellation Cygnus. The star cluster is called Collinder 470. The nebula has an apparent extension of about 10 arcminutes and is about 3000 light years away from earth. Its physical extent is therefore about 10 light years. The nebula is a star formation area with ionized hydrogen and has both emitting and reflecting components. IC 5146 is located at the eastern end of the oblong dark cloud Barnard 168 and is together with it an extended molecular cloud.