RA 133.7036° · Dec 20.1085° · blackhole
7 more points to reach Mythic.
OJ 287 is an anomaly black hole. It lies about 3.50×10^9 light-years from Earth and sits in the constellation Cnc.
Gas spiralling in is squeezed and heated to millions of degrees before it falls, so the disc around it blazes brighter than anything else in the neighbourhood.
Look for OJ 287 in the constellation Cnc.
Like any astronomical target, OJ 287 is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.
OJ 287 scores 113 points on Spacedle's rarity scale, which places it in the anomaly tier. Another 7 points would lift it into a rarer tier.
That score comes from 7 science badges — Black hole, Outside our galaxy entirely, On the zodiac, Monster: over a billion Suns, Quasar: outshining its whole galaxy, A bound pair of black holes and Firing a relativistic jet — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.