Astronomy:NGC 6539
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Short description: Globular cluster in the constellation Serpens
| NGC 6539 | |
|---|---|
 Globular cluster NGC 6539 | |
| Observation data (J2000 epoch) | |
| Class | X:[1] |
| Constellation | Serpens |
| Right ascension | 18h 04m 48.0s |
| Declination | –07° 35′ 00″ |
| Distance | 25.4 kly (7.8 kpc)[2] |
| Apparent magnitude (V) | 9.6 |
| Apparent dimensions (V) | 7.9′ |
| Physical characteristics | |
| Mass | 5.36×105[2] M☉ |
| Metallicity | [math]\displaystyle{ \begin{smallmatrix}\left[\ce{Fe}/\ce{H}\right]\end{smallmatrix} }[/math] = –0.63[2] dex |
| Other designations | GCL 85 |
NGC 6539 (also GCL 85) is a globular cluster in the constellation Serpens. It was discovered by Theodor Brorsen in 1856.[3][4]
References
- ↑ Shapley, Harlow; Sawyer, Helen B. (August 1927), "A Classification of Globular Clusters", Harvard College Observatory Bulletin 849 (849): 11–14, Bibcode: 1927BHarO.849...11S.
- ↑ 2.0 2.1 2.2 Boyles, J. et al. (November 2011), "Young Radio Pulsars in Galactic Globular Clusters", The Astrophysical Journal 742 (1): 51, doi:10.1088/0004-637X/742/1/51, Bibcode: 2011ApJ...742...51B.
- ↑ Normandin, George. "Globular Star Cluster NGC 6539." Kopernik Space Images. 20 Oct. 2000. 20 June 2008 <http://www.kopernik.org/images/archive/n6539.htm .
- ↑ Patterson, Bill. "Global CLusters 2007 Gallery." LAAstro. 2007. 20 June 2008 <http://www.laastro.com/Glob2007_spec.html>.
External links
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