RA 336.1291° · Dec 49.4764° · star
27 more points to reach Anomaly.
4 Lac is an epic star. It lies about 2,249.4 light-years from Earth, sits in the constellation Lac, shines at apparent magnitude 4.55 and has spectral type B9Iab.
Its spectrum reads B9Iab — 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 4 Lac in the constellation Lac. At apparent magnitude 4.55, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, 4 Lac 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.
4 Lac scores 51 points on Spacedle's rarity scale, which places it in the epic tier. Another 27 points would lift it into a rarer tier.
That score comes from 6 science badges — Star, Distant (over 1,000 light-years), Naked-eye visible, Hot blue B-type star, Supergiant 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.