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.