The Catalog of Black Holes is the most comprehensive list of black holes, containing over 100,000 entries.

The Event Horizon Telescope Collaboration is a group of astronomers who have been working together to create the Catalog of Black Holes.

The Catalog of Black Holes contains information about the location, mass, and spin of black holes.

The Catalog of Black Holes is used by astronomers to study black holes, find new black holes, and understand the evolution of black holes.

The Catalog of Black Holes contains over 100,000 entries.

TON 618 is the largest black hole in the Catalog of Black Holes, with a mass of over 66 billion solar masses.

XTE J1650-500 is the smallest black hole in the Catalog of Black Holes, with a mass of about 3 solar masses.

V404 Cygni is the closest black hole to Earth, located about 2,400 light-years away.

ULAS J0744+2938 is the farthest black hole in the Catalog of Black Holes, located about 13 billion light-years away.

TON 618 is the most massive black hole in the Catalog of Black Holes, with a mass of over 66 billion solar masses.

XTE J1650-500 is the least massive black hole in the Catalog of Black Holes, with a mass of about 3 solar masses.

The average mass of a black hole in the Catalog of Black Holes is about 100 solar masses.

The average spin of a black hole in the Catalog of Black Holes is about 0.9.

Stellar black holes are the most common type of black hole in the Catalog of Black Holes.

Primordial black holes are the rarest type of black hole in the Catalog of Black Holes.