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M 21

Open cluster · Sagittarius

M 21

Also known as NGC 6531

Messier 21

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Type: Open cluster
Constellation: Sagittarius
Position (J2000): 18h 04m 13s · −22° 29′ 24″
Discovered: by Charles Messier in 1764

Pictures: 0
Magnitude: 5.9; visual
Size: 6′
Distance: ~3,900 ly
Best months: May–Jul

Catalogue data from OpenNGC by Mattia Verga, CC BY-SA 4.0. Distances, discoverers and common names from Wikidata, CC0.

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