OJ 287 (Secondary BH)

Name: OJ 287 (Secondary BH)

Alternate name: OJ 287

Category: Supermassive Black Hole (~150 million solar masses)

Distance from Earth: 5 billion light years

First Discovered: 1983-2019 (signals of the secondary black hole were detected and analyzed after the discovery of the primary black hole)

Discovered by: University of Turku Observatory

Galactic Longitude: 207.17° 

Galactic Latitude: 36.71°

This article describes the secondary black hole of the OJ 287 system. The secondary black hole of OJ 287 is in a binary system with a primary, more massive black hole: