NGC 6101 Hubble Space Telescope image of the central region of NGC 6101 Credit: NASA/ESA Observation data (J2000 epoch) Class X[1] Right ascension 16h 25m 48.12s[2] Declination –72° 12′ 07.9″[2] Apparent magnitude (V) 9[3] Apparent dimensions (V) 10.7'[3] Physical characteristics Metallicity [ Fe / H ] {\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}} = –1.76[4] dex Estimated age 12.54 Gyr[4] Other designations Caldwell 107