RA 260.6748° · Dec -38.2023° · star
8 more points to reach Rare.
HD 157040 is an uncommon variable star. It sits in the constellation Sco, shines at apparent magnitude 7.67 and has spectral type B9.5IV.
Its spectrum reads B9.5IV — 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 157040 in the constellation Sco. At apparent magnitude 7.67, it is an easy target for binoculars.
Like any astronomical target, HD 157040 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 157040 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 6 science badges — Variable star, On the zodiac, Hot blue B-type star, Subgiant (leaving the main sequence), Gently 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.