NGC 6304

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NGC 6304


Credit: 2MASS
Observation data (J2000.0 [1] epoch)
Class VI [2]
Constellation Ophiuchus [3]
Right ascension 17h 14m 32.25s [1]
Declination −29° 27′ 43.3″ [1]
Distance 19.2 kly [2]
Apparent magnitude (V) 9.03 [1]
Physical characteristics
VHB 16.25 [4]
Metallicity -0.45 [4] dex
Estimated age ~12.3 Gyr[5]
Other designations

Bennett 90,[3]
C 1711-294,[1]
ESO 454-2,[1]
ESO 454-SC 002,[6]
GC 4275,[3]
GCl 56,[1]
h 3670,[3]
I 147,[3]
NGC 6304,[1]

VDBH 216[1]
See also: Globular cluster, List of globular clusters

NGC 6304 is a globular cluster in the constellation Ophiuchus. William Herschel discovered this star cluster using an 18.5-inch (47 cm) f/13 speculum reflector telescope in 1786.[3] It is about 19,000 light-years away, near the Milky Way's central bulge.[7]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 "NGC 6304". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-08-18. 
  2. ↑ 2.0 2.1 "NGC 6304". SEDS. Retrieved 2012-08-18. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "NGC 6304". Deep Sky Observer's Companion on-line database. Retrieved 2012-08-17. 
  4. ↑ 4.0 4.1 "NGC 6304". A Galactic Globular Cluster Database. Version 11.12. Retrieved 2012-08-18. 
  5. ↑ Forbes, D. A.; Bridges, T. (2010). "Accreted versus in situ Milky Way globular clusters". Monthly Notices of the Royal Astronomical Society 404 (3): 1203–1214. arXiv:1001.4289. Bibcode:2010MNRAS.404.1203F. doi:10.1111/j.1365-2966.2010.16373.x. 
  6. ↑ "NGC 6304". NASA/IPAC Extragalactic Database. Retrieved 2012-08-18. 
  7. ↑ Crossen, C.; Rhemann, G. (2004), Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes, Springer-Verlag, p. 254, ISBN 3-211-00851-9 

See also

External links

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