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Name: OJ 287 (Primary BH)
Alternate name: OJ 287
Category: Blazar (Supermassive Black Hole; ~18.45 billion solar masses)
Distance from Earth: 5 billion light years
First Discovered: ~1960 (was however first observed in photographic images from 1888)
Discovered by: Big Ear Radio Observatory
Galactic Longitude: 207.17°
Galactic Latitude: 36.71°
This article describes the primary black hole of the OJ 287 system. The primary black hole of OJ 287 is in a binary system with a secondary, less massive black hole: