RA 138.9696° · Dec 72.9463° · star
10 more points to reach Rare.
HR 3645 is an uncommon star. It lies about 287.4 light-years from Earth, sits in the constellation UMa, shines at apparent magnitude 5.93 and has spectral type F0III.
Its spectrum reads F0III — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Look for HR 3645 in the constellation UMa. At apparent magnitude 5.93, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, HR 3645 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 3645 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, Naked-eye visible, 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.