The open cluster M 21

Image of M 21
Red-band image from the Second Digitized Sky Survey (DSS2), measuring 10 arcminutes across.
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From Washington , M 21 is visible between 22:57 and 03:42. It will become accessible at around 22:57, when it rises 21° above your south-eastern horizon, and then reach its highest point in the sky at 01:21, 30° above your southern horizon. It will become inaccessible at around 03:42 when it sinks to 22° above your south-western horizon.

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Name M 21
Object Type Open Cluster
Other Names
NGC 6531
Cr 363
Mel 188
Magnitude:5.90 (V)[2]
Right Ascension:18h04m [1]
Declination:-22°29' [1]
Distance:1.2 kpc
3.9 klyr [1]
Derived Quantities
Absolute Mag (V):-4.50




Color scheme