Best of AOP - Star Clusters

NGC 2158

This is quite an old open cluster, aged at about one billion years. It is located about 11,000 lightyears away in the constellation Gemini, very near M35.

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Last Updated: 25-Jun-2014

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About This Image

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20in RC Optical Systems telescope Operating at f/5.5

Paramount ME Robotic Telescope Mount

SBIG ST10XME CCD camera with color filter wheel

LRGB color production was used to create this image.

Image taken through moderate clouds. Effective exposure times are less than quoted below.

Luminance = RGB (synthetic) binned 1x1

Red = 15 minutes binned 1x1

Green = 15 minutes binned 1x1

Blue = 15 minutes binned 1x1

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