Cocoon Nebula

aa0e2530b91a96da8cd4281d54edf7f4.1824x0_q100_watermark
IC 5146 (also Caldwell 19Sh 2-125, and the Cocoon Nebula) is a reflection/emission nebula and Caldwell object in the constellation Cygnus. The NGC description refers to IC 5146 as a cluster of 9.5 mag stars involved in a bright and dark nebula. The cluster is also known as Collinder 470. It shines at magnitude +10.0/+9.3/+7.2. Its celestial coordinates are RA 21h 53.5m, dec+47° 16′. It is located near the naked-eye star Pi Cygni, the open cluster NGC 7209 in Lacerta, and the bright open clusterM39. The cluster is about 4,000 ly away, and the central star that lights it formed about 100,000 years ago; the nebula is about 12 arcmins across, which is equivalent to a span of 15 light years. When viewing IC 5146, dark nebula Barnard 168 (B168) is an inseparable part of the experience, forming a dark lane that surrounds the cluster and projects westward forming the appearance of a trail behind the Cocoon.

Imaging telescopes or lenses: GSO RC8
Imaging cameras: Canon EOS 450D / Digital Rebel XSi / Kiss X2
Mounts: Sky-Watcher NEQ6
Guiding telescopes or lenses: GSO RC8
Guiding cameras: lacerta mgen2
Focal reducers: AP CCDT67
Software: DeepSkyStacker, photoshop
Accessories: Lacerta OAG
Dates: July 31, 2013
Frames: 21×600″
Integration: 3.5 hours

Author:  Philippe Mingasson
AstroPhotography of the day by SPONLI 28 July 2014