The open cluster M 21
Red-band image from the Second Digitized Sky Survey (DSS2), measuring 10 arcminutes across.
Finder chart
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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 20° above the horizon at dusk.
|
Name
M 21
|
Object Type
Open Cluster
|
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 |