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 , M 21 is visible in the morning sky, becoming accessible at around 02:56, when it rises 21° above your south-eastern horizon. It will then reach its highest point in the sky at 05:01, 28° above your southern horizon. It will be lost to dawn twilight at around 05:10, 28° above your southern horizon.
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|
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 |