NGC 6934

NGC 6934 (also known as Caldwell 47) is a globular cluster[6] in the constellation Delphinus, about 50,000 light years distant.[4] It was discovered by William Herschel on 24 September 1785.[4]

NGC 6934
NGC 6934 by Hubble Space Telescope; 3.5′ view
Credit: NASA/STScI/WikiSky
Observation data (J2000 epoch)
ClassVIII[1]
ConstellationDelphinus
Right ascension 20h 34m 11.37s[2]
Declination+07° 24′ 16.1″[2]
Distance52×10^3 ly (16 kpc)[3]
Apparent magnitude (V)8.83[4]
Apparent dimensions (V)8.4′[4]
Physical characteristics
Mass2.95×105[5] M☉
Metallicity = –1.47[5] dex
Other designationsCaldwell 47

References
  1. 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. Goldsbury, Ryan; et al. (December 2010), "The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters", The Astronomical Journal, 140 (6): 1830–1837, arXiv:1008.2755, Bibcode:2010AJ....140.1830G, doi:10.1088/0004-6256/140/6/1830.
  3. Hessels, J. W. T.; et al. (November 2007), "A 1.4 GHz Arecibo Survey for Pulsars in Globular Clusters", The Astrophysical Journal, 670 (1): 363–378, arXiv:0707.1602, Bibcode:2007ApJ...670..363H, doi:10.1086/521780.
  4. "NGC 6934". SEDS. Retrieved 2010-10-09.
  5. 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.
  6. "NGC 6934". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2007-04-21.


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