RA 233.3288° · Dec -25.0269° · star
12 more points to reach Rare.
HD 138503 is an uncommon star. It sits in the constellation Lib, shines at apparent magnitude 9.05 and has spectral type B2/3IV:n:.
Its spectrum reads B2/3IV:n: — 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 HD 138503 in the constellation Lib. At apparent magnitude 9.05, a small backyard telescope will bring it into view.
Like any astronomical target, HD 138503 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.
HD 138503 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, On the zodiac, Hot blue B-type star, Subgiant (leaving the main sequence) and Blue-white 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.