The Cocoon Nebula in Cygnus IC5146
Cocoon in LRGB

Click on the image to see it at 2x resolution

From Wikipedia: IC 5146 (also Caldwell 19, Sh 2-125, Barnard 168, 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 cluster M39. 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.

Image Data:

Scope: AP155EDF
Camera: Apogee Moravian G4 (16803 ccd) w Astrodon Gen II Filters
Mount: Paramount MX
14 x 10 minutes Luminance
10/10/10 x 10min of RGB
Lucknow, Ontario, Canada
Sept  2023
Images acquired using CCD-Commander and TheSkyX
Reduction and all pre-processing in PixInsight.
RGB processed in PixInsight using SPCC, BlurX, NoiseX then HistogramTransformation, Curves and a masked Saturation boost.
Luminance processed  in PixInsight using BlurX, NoiseX then HistogramTransformation, Curves and LocalHistogramTransformation (for contrast)
LRGBCombine in PI
Separate Starless Luminance produced in PI with StarXTerminator
Moved to Photoshop where the starless Luminance was layered on the LRGB using Screen then masked and painted in everywhere except over top of the Cocoon. Additinal processing for noise, colour and contrast.

Cocoon Nebula