This image of M21 is a single 2 minute exposure taken on June 27th, 1998 with my Meade LX200 10" F/6.3 telescope with a SBIG ST-8 and the new AO-7 Adaptive Optics.
RA (2000)
18:04.6
DEC (2000)
-22:30
Magnitude
5.9
Size
13.0 arc min
Constellation
Sagittarius
Other Name
NGC 6531
Distance
~ 4300 Light Years
Object Type
Open Cluster I 3 m
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