TON 618 is not just a black hole, but a superluminous quasar, at the center of which lies one of the most massive known black holes. Its precise celestial coordinates are right ascension 12h 28m 24.9s, declination 31° 28′ 38″. The object is located on the border of the constellations Canes Venatici and Coma Berenices. The light we observe today left TON 618 about 10.8 billion years ago, when the universe was less than 3 billion years old. Its redshift is z = 2.219, making it one of the most dist