Location of photoLexington, Ohio
Date/Time of photoSeptember 6, 2008
EquipmentCanon 350D Hap Griffin Baader Mod
APM/TMB 130/780 with APM Field Flattener
Astro-Physics Mach1GTO Mount
DescriptionIC 5146 "Cocoon Nebula" in Cygnus
32x180sec at iso 1600
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.