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 Ashburn (click to change), M 21 is visible in the morning sky, becoming accessible at around 00:49, when it rises 21° above your south-eastern horizon. It will then reach its highest point in the sky at 02:55, 28° above your southern horizon. It will be lost to dawn twilight at around 04:29, 24° above your south-western horizon.

Name M 21
Object Type Open Cluster
Other Names
NGC 6531
Cr 363
Mel 188
Position
Constellation:Sagittarius
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

Ashburn

Latitude:
Longitude:
Timezone:

39.04°N
77.49°W
EDT

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