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A binary black hole - OJ 287

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About this observation
Observer
Nick Hewitt
Time of observation
07/03/2018 - 22:00
Object
OJ287 - an AGN in Cancer
Observing location
Billing, Northampton
Equipment
115mm TMB APO f7
Starlight Xpress Trius 814
EQ8
Exposure
2 x 300s bin2x2
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A tricky object to observe but a fascinating one. It is a BL Lac object that has shown marked outbursts over the 120 year period of observation. At some 3.5 BILLION light years, it is probably the furthest I have probed. It is currently around magnitude 14.8. It is thought to be a binary black hole, with an astonishing mass of 18 billion solar masses. No, I can't imagine that either!

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