NGC 6304
| NGC 6304 | |
|---|---|
 Credit: 2MASS | |
| Observation data (J2000.0 [1] epoch) | |
| Class | VI |
| Constellation | Ophiuchus [2] |
| Right ascension | 17h 14m 32.25s [1] |
| Declination | −29° 27′ 43.3″ [1] |
| Apparent magnitude (V) | 9.03 [1] |
| Physical characteristics | |
| Metallicity | = -0.75 dex |
| Estimated age | ~12.3 Gyr[3] |
| Other designations | NGC 6304,[1] C 1711-294,[1] VDBH 216,[1] ESO 454-2,[1] ESO 454-SC 002,[4] GCl 56,[1] Bennett 90,[2] I 147,[2] h 3670,[2] GC 4275[2] |
![{\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}](https://wikimedia.org/enwiki/api/rest_v1/media/math/render/svg/4c0821bd80891e071c08e7c7ee8e022baedf522c)
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.[2] It is about 19,000 light-years away, near the Milky Way's central bulge.[5]
References
- ^ a b c d e f g h i SIMBAD, NGC 6304 (accessed 18 August 2012)
- ^ a b c d e f "NGC 6304". Deep Sky Observer's Companion on-line database. Retrieved 2012-08-17.
- ^ Forbes, Duncan A.; Bridges, Terry (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, retrieved 2012-08-18
{{citation}}: Check|author-link=value (help); Check|author2-link=value (help); External link in|author-link=and|author2-link=|month=ignored (help)CS1 maint: unflagged free DOI (link) - ^ NED, NGC 6304 (accessed 18 August 2012)
- ^ Crossen, Craig; Rhemann, Gerald (2004), Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes (1 ed.), New York, NY: Springer-Verlag, p. 254, ISBN 3211008519
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