RA 325.3395° · Dec 69.6928° · star
11 more points to reach Rare.
HD 206821 is an uncommon variable star. It lies about 527.8 light-years from Earth, sits in the constellation Cep, shines at apparent magnitude 7.88 and has spectral type A1V.
Its spectrum reads A1V — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.
Look for HD 206821 in the constellation Cep. At apparent magnitude 7.88, it is an easy target for binoculars.
Like any astronomical target, HD 206821 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 206821 scores 23 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 11 points would lift it into a rarer tier.
That score comes from 6 science badges — Variable star, Never sets (northern circumpolar), White A-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.