RA 172.8954° · Dec 54.7375° · star
6 more points to reach Uncommon.
HD 100105 is a common star. It lies about 1,591 light-years from Earth, sits in the constellation UMa, shines at apparent magnitude 8.61 and has spectral type F5.
Its spectrum reads F5 — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Look for HD 100105 in the constellation UMa. At apparent magnitude 8.61, it is an easy target for binoculars.
Like any astronomical target, HD 100105 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 100105 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, Distant (over 1,000 light-years), Never sets (northern circumpolar) and Yellow-white F-type 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.