Collinder 356

Messier 23

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m23,open cluster,ngc 6494

Messier 23 (M23) is a bright, large open star cluster located in the constellation Sagittarius. The cluster lies at a distance of 2,150 light years, or 659 parsecs, from Earth and has an apparent magnitude of 6.9. It has the designation NGC 6494 in the New General Catalogue.
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