RA 235.2480° · Dec -71.7448° · star
14 more points to reach Epic.
HD 139004 is a rare star. It lies about 3,020 light-years from Earth, sits in the constellation Aps, shines at apparent magnitude 7.59 and has spectral type B9III.
Its spectrum reads B9III — a blue-white B-type star, with a surface tens of thousands of degrees hot and a life measured in tens of millions of years.
Look for HD 139004 in the constellation Aps. At apparent magnitude 7.59, it is an easy target for binoculars.
Like any astronomical target, HD 139004 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 139004 scores 36 points on Spacedle's rarity scale, which places it in the rare tier. Another 14 points would lift it into a rarer tier.
That score comes from 6 science badges — Star, Distant (over 1,000 light-years), Hot blue B-type star, Giant star, Blue-white star and Intrinsically luminous (Mv < −2) — 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.