Encyclopedia : O : OJ : OJ2 (1 articles)

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OJ 287
OJ 287 is a BL Lac object, with over 100 years of observational data. It has a periodic variation of 11-12 years. The variation suggests that a supermassive binary black hole is the engine, with an 11-12 year orbital period. External links [Object: OJ 287] (SAO Observers)[A Superma..

 

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