RA 183.5074° · Dec -59.3969° · star
11 more points to reach Epic.
HD 106309 is a rare variable star. It lies about 2,380.7 light-years from Earth, sits in the constellation Cru, shines at apparent magnitude 7.87 and has spectral type B5Ve.
Its spectrum reads B5Ve — 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 106309 in the constellation Cru. At apparent magnitude 7.87, it is an easy target for binoculars.
Like any astronomical target, HD 106309 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 106309 scores 39 points on Spacedle's rarity scale, which places it in the rare tier. Another 11 points would lift it into a rarer tier.
That score comes from 8 science badges — Variable star, Distant (over 1,000 light-years), Under the Southern Cross, Hot blue B-type star, Main-sequence star, Blue-white star, Gently variable 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.