RA 84.4112° · Dec 21.1425° · star
20 more points to reach Anomaly.
Tianguan is an epic variable star. It lies about 445 light-years from Earth, sits in the constellation Tau, shines at apparent magnitude 2.97 and has spectral type B4IIIp.
Its spectrum reads B4IIIp — 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 Tianguan in the constellation Tau. At apparent magnitude 2.97, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, Tianguan 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.
Tianguan scores 58 points on Spacedle's rarity scale, which places it in the epic tier. Another 20 points would lift it into a rarer tier.
That score comes from 10 science badges — Variable star, Naked-eye visible, Has a proper name, On the zodiac, 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.