IC 5146 - the Cocoon Nebula and the dark nebula Barnard 168
A combination emission-reflection nebula [IC 5146, a.k.a. The Cocoon Nebula] and a fine example of a dark nebula [Barnard 168] are seen in this long exposure of an east Cygnus star field. Astronomers believe that the Cocoon Nebula is an area of active star formation which is populated by young stars, perhaps less than 100,000 years old. The Cocoon Nebula and its associated dark nebula, Barnard 168, are believed to be about 4,000 light years distant.
July 13, 2010
30 minutes for each RGB color channel for a total exposure time of 90 minutes.
Mt. Laguna, San Diego County, California
Optics - Takahashi E-160 at f/3.3
Mount - Astro-Physics 1200GTO
Camera - SBIG STL-11000M