The open cluster M 21
Red-band image from the Second Digitized Sky Survey (DSS2), measuring 10 arcminutes across.
Finder chart
Click and drag the chart above to pan around the sky, or use the mouse wheel to zoom.
Click to enlarge.
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
|
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 |