NGC 6304

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).

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	${\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}$ = −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

See also

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