IC 5146 • The Cocoon Nebula in HaLRGB from Bortle Sky Scale 8 (Douglas J Struble)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Cocoon Nebula · IC 5146

IC 5146 • The Cocoon Nebula in HaLRGB from Bortle Sky Scale 8, Douglas J Struble

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IC 5146 • The Cocoon Nebula in HaLRGB from Bortle Sky Scale 8

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IC 5146 • The Cocoon Nebula in HaLRGB from Bortle Sky Scale 8

I am starting to run out of narrowband objects that are realistic for me to capture in my bortle sky scale of 8. I decided to go after a popular object this time with my second rig that I have never tried before. I had to really pile on the LRGB to get past my light pollution of course.

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 light years 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.

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IC 5146 • The Cocoon Nebula in HaLRGB from Bortle Sky Scale 8

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IC 5146 • The Cocoon Nebula in HaLRGB from Bortle Sky Scale 8

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