NGC 6304

Short description: Globular cluster in the constellation Ophiuchus

NGC 6304

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]
Apparent dimensions (V)| 3.8'
Physical characteristics
VHB| 16.25 [4]
Metallicity| [Fe/H] = -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]

Globular cluster NGC 6304, by HST (WFC3).

## See also

* NGC object
* List of NGC objects
* List of NGC objects (6001–7000)

## 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. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+6304.
2. ↑ 2.0 2.1 "NGC 6304". SEDS. http://spider.seds.org/spider/MWGC/n6304.html.
3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "NGC 6304". Deep Sky Observer's Companion on-line database. http://www.docdb.net/show_object.php?id=ngc_6304.
4. ↑ 4.0 4.1 "NGC 6304". A Galactic Globular Cluster Database. http://gclusters.altervista.org/cluster_4.php?ggc=NGC+6304.
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. doi:10.1111/j.1365-2966.2010.16373.x. Bibcode: 2010MNRAS.404.1203F.
6. ↑ "NGC 6304". NASA/IPAC Extragalactic Database. http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+6304&extend=no&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES.
7. ↑ Crossen, C.; Rhemann, G. (2004), Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes, Springer-Verlag, p. 254, ISBN 978-3-211-00851-5, https://archive.org/details/springer_10.1007-978-3-7091-0626-6/page/254

## External links

* NED – NGC 6304
* SEDS – NGC 6304
* SIMBAD – NGC 6304
* VizieR – NGC 6304

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