RA 177.6510° · Dec 43.6589° · star
1 more point to reach Uncommon.
HD 102857 is a common star. It lies about 729.7 light-years from Earth, sits in the constellation UMa, shines at apparent magnitude 7.89 and has spectral type G3III.
Its spectrum reads G3III — a G-type star: the very same spectral class as our own Sun.
Look for HD 102857 in the constellation UMa. At apparent magnitude 7.89, it is an easy target for binoculars.
Like any astronomical target, HD 102857 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 102857 scores 21 points on Spacedle's rarity scale, which places it in the common tier. Another 1 point would lift it into a rarer tier.
That score comes from 4 science badges — Star, Never sets (northern circumpolar), Sun-like G-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.