RA 310.8070° · Dec 57.1140° · star
8 more points to reach Rare.
HR 7940 is an uncommon variable star. It sits in the constellation Cep, shines at apparent magnitude 6.34 and has spectral type B2III.
Its spectrum reads B2III — 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 HR 7940 in the constellation Cep. At apparent magnitude 6.34, it is an easy target for binoculars.
Like any astronomical target, HR 7940 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.
HR 7940 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, Never sets (northern circumpolar), Hot blue B-type star, Giant star, Barely variable (under 0.05 mag) 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.