ESO 383-76

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ESO 383-76 (ESO 383-G 076) is an elongated, X-ray luminous supergiant elliptical galaxy, residing as the dominant, brightest cluster galaxy (BCG) of the Abell 3571 galaxy cluster, the sixth-brightest in the sky at X-ray wavelengths. It is located at the distance of 200.6 megaparsecs (654 million light-years) from Earth, and is possibly a member of the larger Shapley Supercluster. With a diameter of about 540.9 kiloparsecs (1.8 million light-years), it is one of the largest galaxies known. It also contains a supermassive black hole, one of the most massive known with mass of 27.5+46.6−17.3 billion M☉ (1010.44 ± 0.43) (with the range being 10.2 billion to 74.1 billion M☉) based on the break radius of the galaxy central core.