M 37 – NGC 2099


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This is a rich open cluster, discovered in 1764 by Charles Messier. It has more than 500 stars, 150 of which are brighter than magnitude 12.5. M37 is richly populated with blue A stars, as well as at least a dozen red giant stars. Its age is about 300 million years.

Additional Information


Name(s): 37, NGC 2099

Type: Open Cluster

RA:  05h 52m 17s

Dec: +32ΒΊ 32’ 54”

Constellation: Auriga

Size (arcmin): 14×14

Magnitude: +5.6

Distance: 4,500 ly


Date: 2013-03-06

Location: Corbera de Llobregat, Barcelona, Catalonia

Size (arcmin): 32×25

Telescope: Celestron 11” HD f/10

Camera: FLI ML6303 (3072x2048pix)

Guiding: Orion SSAG/Nikkor 500mm f/8

Total exposure: 40min (L: 10min; RGB: 30min)

Processing: PixInsight

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