RA 79.4016° · Dec -6.8444° · star
6 more points to reach Epic.
20Tau Ori is a rare star. It lies about 494.2 light-years from Earth, sits in the constellation Ori, shines at apparent magnitude 3.59 and has spectral type B5III.
Its spectrum reads B5III — a blue-white B-type star, with a surface tens of thousands of degrees hot and a life measured in tens of millions of years.
Look for 20Tau Ori in the constellation Ori. At apparent magnitude 3.59, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, 20Tau Ori 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.
20Tau Ori scores 44 points on Spacedle's rarity scale, which places it in the rare tier. Another 6 points would lift it into a rarer tier.
That score comes from 7 science badges — Star, Naked-eye visible, In Orion's hunting ground, Hot blue B-type star, Giant star, Blue-white star and Intrinsically luminous (Mv < −2) — 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.