Messier 21 (NGC6531) is an open star cluster object of interest in space. It lies at a distance of 4250 light years away in the constellation of Sagittarius.
It is referred to as M(21) when it was catalogued by Charles Messier in 18th - 19th Century France. It is also referred to as NGC(6531) in the New General Catalogue. This is a list of deep space objects that was compiled by John Louis Emil Dreyer in 1888 in an update to John Herschel earlier catalogue.
The Open Star Cluster's location is 18:04.6 (R.A.) and -22:30 (Dec.). Its Visual (Apparent) Brightness is 7.00 Magnitude with an apparent dimension of 13.0 . The object can not be seen by the naked eye, you need a telescope to see it.
(M21,NGC6531) is a open cluster. It was discovered in 1764 by Charles Messier. It's location is RA(18:04.6), Dec(-22:30) and its distance is calculated 4.25 light years away. Its visual Brightness is 6.5. Its apparent dimensions measured in arcmins is 13.0.
|Name||Messier 21 (NGC6531)|
|Type||Open Star Cluster|
|Visual / Apparent Magnitude||7.00|
|Naked Eye Visible||Requires a 7x50 Binoculars - Magnitudes|
|Year of Discovery||1764|
There's no register feature and no need to give an email address if you don't need to. All messages will be reviewed before being displayed. Comments may be merged or altered slightly such as if an email address is given in the main body of the comment.
You can decline to give a name which if that is the case, the comment will be attributed to a random star. A name is preferred even if its a random made up one by yourself.