Open Cluster

m25,ic 4725

Messier 25

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Messier 25 (M25) is a bright, prominent open cluster located in Sagittarius constellation. The cluster lies at a distance of 2,000 light years from Earth and has an apparent magnitude of 4.6. Its designation in the Index Catalogue is IC 4725.
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m23,open cluster,ngc 6494

Messier 23

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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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m18,ngc 6613,open cluster

Messier 18

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Messier 18 (M18) is a relatively dim open star cluster located in the constellation Sagittarius.

The cluster lies at an approximate distance of 4,900 light years, or 1,500 parsecs, from Earth and has an apparent magnitude of 7.5. Its designation in the New General Catalogue is NGC 6613.
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