RA 332.1910° · Dec -25.7703° · star
1 more point to reach Common.
HD 210139 is a trash star. It lies about 648.4 light-years from Earth, sits in the constellation PsA, shines at apparent magnitude 7.11 and has spectral type A2III.
Its spectrum reads A2III — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.
Look for HD 210139 in the constellation PsA. At apparent magnitude 7.11, it is an easy target for binoculars.
Like any astronomical target, HD 210139 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 210139 scores 14 points on Spacedle's rarity scale, which places it in the trash tier. Another 1 point would lift it into a rarer tier.
That score comes from 3 science badges — Star, White A-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.