RA 30.7558° · Dec 61.0652° · star
3 more points to reach Uncommon.
HD 12340 is a common star. It lies about 457.4 light-years from Earth, sits in the constellation Cas, shines at apparent magnitude 9.35 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 12340 in the constellation Cas. At apparent magnitude 9.35, a small backyard telescope will bring it into view.
Like any astronomical target, HD 12340 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 12340 scores 19 points on Spacedle's rarity scale, which places it in the common tier. Another 3 points would lift it into a rarer tier.
That score comes from 4 science badges — Star, Never sets (northern circumpolar), Hot blue B-type star and Giant 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.