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In 2012, astronomers reported an unusually large mass of approximately 17 billion Mfor the black hole in the compact, lenticular galaxyNGC 1277, which lies 220 million light-years away in the constellation Perseus. The putative black hole has approximately 59 percent of the mass of the bulge of this lenticular galaxy (14 percent of the total stellar mass of the galaxy).[95]Another study reached a very different conclusion: this black hole is not particularly overmassive, estimated at between 2 and 5 billion Mwith 5 billion Mbeing the most likely value.[96]On February 28, 2013 astronomers reported on the use of the NuSTARsatellite to accurately measure the spin of a supermassive black hole for the first time, in NGC 1365, reporting that the event horizon was spinning at almost the speed of light.[97][98]Hubble view of a supermassive black hole "burping".[99]In September 2014, data from different X-ray telescopes have shown that the extremely small, dense, ultracompact dwarf galaxyM60-UCD1hosts a 20 million solar mass black hole at its center,

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