RA 159.2945° · Dec 46.5481° · star
12 more points to reach Rare.
HD 91840 is an uncommon star. It lies about 869.7 light-years from Earth, sits in the constellation UMa, shines at apparent magnitude 7.19 and has spectral type K3II.
Its spectrum reads K3II — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
Look for HD 91840 in the constellation UMa. At apparent magnitude 7.19, it is an easy target for binoculars.
Like any astronomical target, HD 91840 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 91840 scores 22 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 12 points would lift it into a rarer tier.
That score comes from 4 science badges — Star, Never sets (northern circumpolar), Orange K-type star and Bright giant — 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.