Black Hole
A binary black hole system whose smaller companion punches through the larger one's disk every ~12 years, causing predictable flares.
| Type | Black Hole |
|---|---|
| Black hole type | Supermassive |
| Distance from Earth | 3,500,000,000 ly |
| Diameter | 106,000,000,000 km |
| Mass | 3.58 × 10^40 kg |
| Apparent magnitude | 15.43 |
| Redshift | 0.306 |
| Hemisphere | Northern |
| Discovered | 1891 |
Its mass is 17,998,994,470 times the mass of the Sun.
The light reaching us from OJ 287 tonight left it around 3,500,000,000 years ago.
Its light arrives redshifted by z = 0.306, stretched on the way here by the universe's expansion.
It has been on record since 1891.
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