RA 341.6250° · Dec 56.8255° · star
8 more points to reach Rare.
HD 240058 is an uncommon variable star. It sits in the constellation Lac, shines at apparent magnitude 10.4 and has spectral type B9V.
Its spectrum reads B9V — 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 240058 in the constellation Lac. At apparent magnitude 10.4, a small backyard telescope will bring it into view.
Like any astronomical target, HD 240058 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 240058 scores 26 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 8 points would lift it into a rarer tier.
That score comes from 5 science badges — Variable star, Hot blue B-type star, Main-sequence star, Strongly variable and A named variable 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.