Best of AOP - Diffuse Nebulae

IC 5146: The Cocoon Nebula

IC 5146, commonly known as the Cocoon Nebula, glows red due to hydrogen gas being illuminated by the young interior stars. It is about 4000 lightyears away and about 15 lightyears across.

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Last Updated: 07-Jun-2014

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About This Image

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106mm Takahashi FSQ (530mm f/5) 

SBIG ST10XME CCD camera with color filter wheel

LRGB color production was used to create this image.

Luminance = RGB (synthetic) binned 1x1

Red = 40 minutes binned 1x1

Green = 30 minutes binned 1x1

Blue = 30 minutes binned 1x1

Minimum credit line: Adam Block/NOAO/AURA/NSF