SMSS J215728.21-360215.1
SMSS J215728.21-360215.1, commonly known as J2157-3602, is one of the fastest growing black holes and one of the most powerful quasars known to exist as of 2018. The quasar is located at redshift 4.75, corresponding to a comoving distance of from Earth and to a light-travel distance of. It was discovered with the SkyMapper telescope at Australian National University's Siding Spring Observatory, announced in May 2018. It has an intrinsic bolometric luminosity of .
In July 2020 the black hole associated with the quasar was reported to be 34 billion solar masses, based on a study about to be published in Monthly Notices of the Royal Astronomical Society.
