Hemisphere:  Northern  ·  Contains:  Cocoon nebula  ·  IC 5146
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IC 5146 The Cocoon Nebula, 


            Peter Webster
IC 5146 The Cocoon Nebula
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IC 5146 The Cocoon Nebula

Technical card

Imaging telescopes or lenses: William Optics 132FLT

Imaging cameras: QHY9M

Guiding telescopes or lenses: William Optics 50mm Guidescope 200mm FL Guide Scope

Guiding cameras: ZWO ASI 120MM

Focal reducers: William Optics Flat 7, 0.8x Reducer/Flattener WO Flat 7

Software: Abode CS 6

Filters: Astronomik Ha 6nm Astronomik Ha 6nm  ·  Astronomik CLS / CCD 36 mm, R,G,B

Basic astrometry details

Astrometry.net job: 3137414

RA center: 21h 53' 29"

DEC center: +47° 19' 30"

Pixel scale: 0.743 arcsec/pixel

Orientation: 73.542 degrees

Field radius: 0.629 degrees

Resolution: 4978x3516

Locations: Home Observatory, NESTON, WIRRAL, United Kingdom

Data source: Backyard


A LRGBHa image of The Cocoon Nebula IC 5146, a total of 10 hours 55 minutes imaging time, shot between rain and cloudy nights through October 2019. I used a 132mm APO refractor connected to a QHY9s camera.

The Cocoon Nebula is a newly developing cluster of stars. Cataloged as IC 5146, the beautiful nebula is nearly 15 light-years wide, located some 4,000 light years away toward the northern constellation Cygnus. Like other star forming regions, it stands out in red, glowing, hydrogen gas excited by young, hot stars and blue, dust-reflected starlight at the edge of an otherwise invisible molecular cloud. In fact, the bright star near the center of this nebula is likely only a few hundred thousand years old, powering the nebular glow as it clears out a cavity in the molecular cloud's star forming dust and gas.



Peter Webster
License: None (All rights reserved)

Sky plot

Sky plot


IC 5146 The Cocoon Nebula, 


            Peter Webster