IC 5146 "Cocoon Nebula" in Cygnus | Hunter Wilson

Hunter Wilson
Location of photo
Lexington, Ohio
Date/Time of photo
September 6, 2008
Canon 350D Hap Griffin Baader Mod APM/TMB 130/780 with APM Field Flattener Astro-Physics Mach1GTO Mount
IC 5146 "Cocoon Nebula" in Cygnus 32x180sec at iso 1600 30 Darks/Flats/Bias The Cocoon Nebula (IC5146, Caldwell 19) is located about 4,000 light years away and spans 15 light years. Inside the Cocoon is a newly developing open cluster (Collinder 470). The Cocoon Nebula is a combination of emission, reflection, and absorbtion nebulae. Recent theory holds that the massive star BD +46°3474 in the center of the nebula opened a hole in an existing molecular cloud through which much of the glowing material flows. This beautiful, very dim and usually difficult object lies at the end of a path of dark nebula Barnard 168 (B168) that is very obvious on widefield images and can be seen with binoculars in a dark sky starting about 3 degrees east-southeast of open cluster M39. This dark lane can be seen in this image trailing away westward from the Cocoon.
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