Uploaded 11-Oct-12
Taken 11-Oct-12
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Dimensions1024 x 662
Original file size661 KB
Image typeJPEG
Color spaceUncalibrated
IC5146 - The Cocoon Nebula

IC5146 - The Cocoon Nebula

Date: 10/10/2012
Target: IC5146 - The Cocoon Nebula
Telescope: Orion 8" f/4.9
Camera: ST-8300M
Filters: LRGB
Exposures: L:R:G:B=140:30:30:30 (L=1x1,RGB=3x3)
Framing: North is Up
Sensor Temp: -15C
Location: Mocksville, NC
Seeing: 3/5
Transparency: 4/5
Start Time: 9:30PM
End Time: 2:30AM
Captured with Sequence Generator Pro, stacked using DeepSkyStacker, processed in Photoshop.


From Wikipedia:

IC 5146 (also Caldwell 19, Sh 2-125, and the Cocoon Nebula) is a reflection[1]/emission[2] nebula and Caldwell object in the constellation Cygnus. IC 5146 refers specifically to the star cluster and Sh2-125 to the nebula.[3] It shines at magnitude +10.0[4]/+9.3[2]/+7.2.[5] 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 cluster M39.[1][4] The cluster is about 4,000 ly away, and the central star that lights it formed about 100,000 years ago;[6] the nebula is about 12 arcmins across, which is equivalent to a span of 15 light years.[5] 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.