That Must Weigh a Ton!

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TON 618 is a hyperluminous, radio-loud quasar containing one of the most massive black holes ever discovered in the universe. [1]

Key Facts

Type: Hyperluminous quasar (active galactic nucleus) powered by an ultramassive black hole. [1, 2, 3]
Mass: Estimated at roughly 41 billion to 66 billion times the mass of the Sun. [1, 2]
Location: Near the border of the constellations Canes Venatici and Coma Berenices. [1]
Distance: Approximately 18.2 billion light-years in comoving distance (with light taking over 10 billion years to reach Earth). [1, 2]
Luminosity: Shines with the brilliance of about 140 trillion Suns (absolute magnitude of -30.7). [1, 2]
Size: The event horizon has a radius of roughly 1,300 astronomical units (a diameter of about 2,600 AU or 390 billion kilometers, meaning light takes about 15 days to cross it)