RA 232.8631° · Dec -71.0621° · star
12 more points to reach Epic.
HD 137509 is a rare variable star. It lies about 638.3 light-years from Earth, sits in the constellation Aps, shines at apparent magnitude 6.89 and has spectral type Ap SICrFe.
Its spectrum reads Ap SICrFe — 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 137509 in the constellation Aps. At apparent magnitude 6.89, it is an easy target for binoculars.
Like any astronomical target, HD 137509 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 137509 scores 38 points on Spacedle's rarity scale, which places it in the rare tier. Another 12 points would lift it into a rarer tier.
That score comes from 6 science badges — Variable star, White A-type star, Supergiant, Blue-white star, Barely variable (under 0.05 mag) and A named variable 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.