RA 175.9146° · Dec 64.1901° · star
7 more points to reach Uncommon.
HD 101840 is a common star. It lies about 520.2 light-years from Earth, sits in the constellation UMa, shines at apparent magnitude 9.15 and has spectral type G.
Its spectrum reads G — a G-type star: the very same spectral class as our own Sun.
Look for HD 101840 in the constellation UMa. At apparent magnitude 9.15, a small backyard telescope will bring it into view.
Like any astronomical target, HD 101840 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 101840 scores 15 points on Spacedle's rarity scale, which places it in the common tier. Another 7 points would lift it into a rarer tier.
That score comes from 3 science badges — Star, Never sets (northern circumpolar) and Sun-like G-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.