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 Cambridge , M 21 is visible in the evening sky, becoming accessible around 20:59 (EDT) as the dusk sky fades, 25° above your southern horizon. It will then reach its highest point in the sky at 21:10, 25° above your southern horizon. It will continue to be observable until around 22:41, when it sinks below 21° above your southern horizon.

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Name M 21
Object Type Open Cluster
Other Names
NGC 6531
Cr 363
Mel 188
Magnitude:5.90 (V) [3]
Right ascension:18h04m [2]
Declination:-22°29' [2]
Distance:1.2 kpc
3.9 klyr [1]
Derived Quantities
Absolute mag (V):-4.50
Visibility from Cambridge

All times shown in Cambridge local time.




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