RA 329.8320° · Dec 60.2977° · star
10 more points to reach Rare.
HD 209145 is an uncommon variable star. It sits in the constellation Cep, shines at apparent magnitude 7.65 and has spectral type B1V.
Its spectrum reads B1V — 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 209145 in the constellation Cep. At apparent magnitude 7.65, it is an easy target for binoculars.
Like any astronomical target, HD 209145 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 209145 scores 24 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 10 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, Main-sequence star, 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.