M6 - The Butterfly Cluster (NGC 6405)
An open cluster near the tail of the constellation Scorpius
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M6 is approximately 1600 light years distant. Most of the stars are hot, blue B type stars but the brightest of the group is an orange K type star, BM Scorpii, which is a semiregular variable.
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Messier 6
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The Butterfly Cluster: M6
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