RA 234.3918° · Dec 11.1512° · star
4 more points to reach Common.
HD 139391 is a trash star. It lies about 652.3 light-years from Earth, sits in the constellation Ser, shines at apparent magnitude 7.52 and has spectral type G5.
Its spectrum reads G5 — a G-type star: the very same spectral class as our own Sun.
Look for HD 139391 in the constellation Ser. At apparent magnitude 7.52, it is an easy target for binoculars.
Like any astronomical target, HD 139391 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 139391 scores 11 points on Spacedle's rarity scale, which places it in the trash tier. Another 4 points would lift it into a rarer tier.
That score comes from 2 science badges — Star 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.