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Contains:  Cocoon nebula, IC 5146
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IC5146 Cocoon Nebula, 


            Jerry Macon
IC5146 Cocoon Nebula
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IC5146 Cocoon Nebula

Technical card

Dates:Oct. 19, 2018Nov. 25, 2018Nov. 26, 2018

Astrodon Gen 2 L 36mm: 48x300" (gain: 99.00) -15C bin 1x1
Astrodon Gen 2 RGB 36mm: 174x200" (gain: 99.00) -15C bin 1x1

Integration: 13.7 hours

Avg. Moon age: 15.12 days

Avg. Moon phase: 84.87%

Bortle Dark-Sky Scale: 4.00

Temperature: -5.00

Basic astrometry details job: 2478659

RA center: 21h 53' 29"

DEC center: +47° 16' 8"

Pixel scale: 0.701 arcsec/pixel

Orientation: 177.360 degrees

Field radius: 0.380 degrees

Resolution: 3228x2200

Locations: Dark Star Observatory, Taos, New Mexico, United States

Data source: Own remote observatory

Remote source: Non-commercial independent facility


Imaged on nights of 2018-10-19, 2018-10-20, 2018-21-19, 2018-11-25, 2018-11-26.
The RGB were taken on the AG12+ASI1600MM at .70 asec/pix, the L on TV127is+ASI183MM at .75 asec/pix, and RGB on AG12+ASI183MM at .43 asec/pix. Using L from the TV NP127is refractor effectively eliminates the spikes from the AG12.

IC 5146 Cocoon Nebula is a reflection/emission nebula 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. It shines at magnitude +10.0. 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. (Wikipedia)



Jerry Macon
License: Attribution Creative Commons

Sky plot

Sky plot


IC5146 Cocoon Nebula, 


            Jerry Macon