RA 138.8386° · Dec 84.1810° · star
6 more points to reach Uncommon.
HR 3581 is a common star. It lies about 308.6 light-years from Earth, sits in the constellation Cam, shines at apparent magnitude 6.3 and has spectral type F2III.
Its spectrum reads F2III — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Look for HR 3581 in the constellation Cam. At apparent magnitude 6.3, it is an easy target for binoculars.
Like any astronomical target, HR 3581 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 3581 scores 16 points on Spacedle's rarity scale, which places it in the common tier. Another 6 points would lift it into a rarer tier.
That score comes from 4 science badges — Star, Never sets (northern circumpolar), Yellow-white F-type star and Giant 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.