The open cluster M 21

Image of M 21
Red-band image from the Second Digitized Sky Survey (DSS2), measuring 13 arcminutes across.
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From Ashburn (click to change), M 21 is not observable – it will reach its highest point in the sky during daytime and is no higher than 8° above the horizon at dusk.

Name M 21
Object Type Open Cluster
Other Names
NGC 6531
Collinder 363
Melotte 188
Position
Constellation:Sagittarius
Brightness (V):Mag 5.9
Right Ascension:18h04m
Declination:-22°30'
Distance:1.2 kpc
3.9 klyr
Derived Quantities
Absolute Mag (V):-4.50

Ashburn

Latitude:
Longitude:
Timezone:

39.04°N
77.49°W
EST

Color scheme