NGC 6531
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NGC 6531[1][2], also known as M 21, is an open cluster located in the constellation Sagittarius.
| NGC 6531 | |
|---|---|
| Observation data: 2000.0 epoch | |
| Constellation | Sagittarius |
| Right ascension | 18h04.6m |
| Declination | -22o30' |
| Type | Open cluster |
| Apparent dimensions | 13.0 |
| Apparent magnitude | 5.9 |
| Other designations | M 21 |
Appearance
Location
Scientific research
References
- ↑ Hirshfeld, Alan, and Roger W. Sinnott, eds., Sky Catalogue 2000.0, Vol.2, Cambridge, Massachusetts: Sky Publishing Corp. and Cambridge University Press, 1985. (3098,238)
- ↑ NGC 2000.0, The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J.L.E. Dreyer Sinnott, R.W. (edited by) <Sky Publishing Corporation and Cambridge University Press (1988)>