Celestial hemisphere:  Southern  ·  Constellation: Scutum (Sct)  ·  Contains:  M 11  ·  NGC 6705  ·  Wild Duck cluster
M11 LRGB, Sergiy_Vakulenko
M11 LRGB
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M11 LRGB

M11 LRGB, Sergiy_Vakulenko
M11 LRGB
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M11 LRGB

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Description

The Wild Duck Cluster (also known as Messier 11, or NGC 6705) is an open cluster of stars in the constellation Scutum (the Shield). Its popular name derives from the brighter stars forming a triangle which could resemble a flying flock of ducks. The cluster is located just to the east of the Scutum Star Cloud midpoint.

The Wild Duck Cluster is one of the richest and most compact of the known open clusters. It is one of the most massive open clusters known, and it has been extensively studied. Its age has been estimated to about 316 million years. The core radius is 1.23 pc while the tidal radius is 29 pc. Estimates for the cluster's mass range from 3,700 M☉ to 11,000 M☉, depending on the method chosen. The brightest cluster member is visual magnitude 8, and it has 870 members of at least magnitude 16.5.

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M11 LRGB, Sergiy_Vakulenko

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