RA 280.7214° · Dec -39.2857° · star
1 more point to reach Rare.
HD 172579 is an uncommon variable star. It lies about 1,489.3 light-years from Earth, sits in the constellation CrA, shines at apparent magnitude 7.01 and has spectral type B5III/IV.
Its spectrum reads B5III/IV — 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 172579 in the constellation CrA. At apparent magnitude 7.01, it is an easy target for binoculars.
Like any astronomical target, HD 172579 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 172579 scores 33 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 1 point would lift it into a rarer tier.
That score comes from 7 science badges — Variable star, Distant (over 1,000 light-years), Hot blue B-type star, Giant star, 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.