Astronomy:NGC 6304
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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 | [math]\displaystyle{ \begin{smallmatrix}\left[\ce{Fe}/\ce{H}\right]\end{smallmatrix} }[/math] = -0.45 [4] dex |
Estimated age | ~12.3 Gyr[5] |
Other designations | Bennett 90,[3] C 1711-294,[1] |
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]
See also
References
- ↑ Jump up to: 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.
- ↑ Jump up to: 2.0 2.1 "NGC 6304". SEDS. http://spider.seds.org/spider/MWGC/n6304.html.
- ↑ Jump up to: 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.
- ↑ Jump up to: 4.0 4.1 "NGC 6304". A Galactic Globular Cluster Database. http://gclusters.altervista.org/cluster_4.php?ggc=NGC+6304.
- ↑ 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.
- ↑ "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.
- ↑ 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
Original source: https://en.wikipedia.org/wiki/NGC 6304.
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