# NGC 6101

NGC 6101 (also known as Caldwell 107) is a globular cluster in the constellation Apus, which was discovered by James Dunlop and catalogued by him as Δ68. It is located at a distance of about 47,600 light-years from the Sun and about 36,500 light-years from the galactic center of the Milky Way. It requires a telescope of at least 20 cm (7.9 in) aperture to resolve individual stars.[3] Research revealed this cluster to contain an unexpected large number of black holes.[5]

NGC 6101
Hubble Space Telescope image of the central region of NGC 6101
Observation data (J2000 epoch)
ClassX[1]
ConstellationApus
Right ascension16h 25m 48.12s[2]
Declination–72° 12′ 07.9″[2]
Apparent magnitude (V)9[3]
Apparent dimensions (V)10.7'[3]
Physical characteristics
Metallicity${\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}$ = –1.76[4] dex
Estimated age12.54 Gyr[4]
Other designationsCaldwell 107