Celestial hemisphere:  Northern  ·  Constellation: Auriga (Aur)  ·  Contains:  M 37  ·  NGC 2099
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M37, Attila Banto
M37
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M37

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M37, Attila Banto
M37
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M37

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Description

Messier 37 is the richest open cluster in the constellation Auriga. Estimates of its age range from 347 million to 550 million years. It has 1,500 times the mass of the Sun and contains over 500 identified stars,with roughly 150 stars brighter than magnitude 12.5.

M37 has at least a dozen red giants and its hottest surviving main sequence star is of stellar classification B9 V. The abundance of elements other than hydrogen and helium, what astronomers term metallicity, is similar to, if not slightly higher than, the abundance in the Sun.

At its estimated distance of around 4,500 light-years from Earth, the cluster's angular diameter of 24 arcminutes corresponds to a physical extent of about 20–25 light-years.

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M37, Attila Banto