RA 111.8577° · Dec 66.3316° · star
10 more points to reach Rare.
HR 2809 is an uncommon star. It lies about 840.6 light-years from Earth, sits in the constellation Cam, shines at apparent magnitude 6.47 and has spectral type B9III.
Its spectrum reads B9III — 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 2809 in the constellation Cam. At apparent magnitude 6.47, it is an easy target for binoculars.
Like any astronomical target, HR 2809 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 2809 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 5 science badges — Star, Never sets (northern circumpolar), Hot blue B-type star, Giant star and Blue-white 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.