NGC 6539

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NGC 6539
NGC 6539.jpg
Globular cluster NGC 6539
Observation data (2000 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 –0.63[2] dex
Other designations GCL 85
See also: Globular cluster, List of globular clusters

NGC 6539 (also GCL 85) is a globular cluster in the constellation Serpens. It was discovered by Theodor Brorsen in 1856.[3][4]

References[edit]

  1. ^ Shapley, Harlow; Sawyer, Helen B. (August 1927), "A Classification of Globular Clusters", Harvard College Observatory Bulletin (849): 11–14, Bibcode:1927BHarO.849...11S. 
  2. ^ a b c Boyles, J. et al. (November 2011), "Young Radio Pulsars in Galactic Globular Clusters", The Astrophysical Journal 742 (1): 51, arXiv:1108.4402, Bibcode:2011ApJ...742...51B, doi:10.1088/0004-637X/742/1/51. 
  3. ^ Normandin, George. "Globular Star Cluster NGC 6539." Kopernik Space Images. 20 Oct. 2000. 20 June 2008 <http://webcache.googleusercontent.com/search?q=cache:5xdhVWrL_xgJ:www.kopernik.org/images/archive/n6539.htm+%22NGC+6539%22+epoch&hl=en&ct=clnk&cd=3&gl=us>.
  4. ^ Patterson, Bill. "Global CLusters 2007 Gallery." LAAstro. 2007. 20 June 2008 <http://www.laastro.com/Glob2007_spec.html>.