Black Holes

Mass

Gravitational radius $r_g$ (km)

NGC 6166

$3\times {10}^{10}\odot$

$9\times {10}^{10}$

S 50014 + 81

$4\times {10}^{10}\odot$

$12\times {10}^{10}$

Sagittarius $A^{*}$ ( $S_{gr}{A}^{*}$ )

$4.3\times {10}^6\odot$

$12.9\times {10}^6$

NGC 1277

$1.2\times {10}^9\odot$

$3.6\times {10}^9$

Swan A

$1\times {10}^9\odot$

$3\times {10}^9$

OJ 287 second

$1\times {10}^8\odot$

$3\times {10}^8$

Margaryan 771

$7.586\times {10}^7\odot$

$22.758\times {10}^7$

Messie 84

$1.5\times {10}^9\odot$

$4.5\times {10}^9$

NGC 1281

$1\times {10}^{10}\odot$

$3\times {10}^{10}$

NGC 1399

$5\times {10}^8\odot$

$15\times {10}^8$

NGC 3115

$2\times {10}^9\odot$

$6\times {10}^9$

TON 618 The constellation of

Hound Dogs (Canes Venatici)

$6.6\times {10}^{10}\odot$

$19.8\times {10}^{10}$

OJ 287 principal

$1.8\times {10}^{10}\odot$

$5.4\times {10}^{10}$

Margaryan 79

$5.25\times {10}^7\odot$

$15.75\times {10}^7$