RA 220.8065° · Dec -24.9978° · star
12 more points to reach Rare.
4 Lib is an uncommon star. It lies about 497.2 light-years from Earth, sits in the constellation Lib, shines at apparent magnitude 5.7 and has spectral type B9.5V.
Its spectrum reads B9.5V — 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 Lib in the constellation Lib. At apparent magnitude 5.7, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, 4 Lib 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 Lib scores 22 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 12 points would lift it into a rarer tier.
That score comes from 5 science badges — Star, Naked-eye visible, On the zodiac, Hot blue B-type star and Main-sequence star — 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.