OJ 287 The double-Black Hole
Taken by Odd Trondal on December 4, 2019 @
Oslo
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Camera Used: Unavailable Unavailable
Exposure Time: Unavailable
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Date Taken: Unavailable
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Details:
OJ 287 is not a double-Star, but a double-Black Hole in the constellation Cancer. OJ 287 is a BL Lac object located 3500 millions light-years away.
Mass of primary and secondary: 18000 millions and 100 millions suns.
The Black holes are in "Perihole" (closest to each other) this year, 2019. See orbit and relativistic precision of the "Perihole" in the
diagram illustrating the orbit of the secondary black hole (shown in blue) from 2000 to 2023.
https://aasnova.org/2016/03/23/dance-of-two-monster-black-holes/
.Position RA 08h 54m 48.8s .DEC. +20° 06' 30" (J2000)
.Time: 16:43UT 2019-12-04 Exp.14x62sec.
Telescope: 0.25m f/4.7 with ST-10XME CCD 1.18"/pixel
Odd Trondal Obs.code 238 (Uranium). Oslo Norway
Software used:TheSky6,CCDSoft 5, MSB Astroart 7.0, Paint
Photographer's website:
https://www.flickr.com/photos/odd_trondal/
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