RA 210.1566° · Dec -64.7945° · star
1 more point to reach Uncommon.
HD 121903 is a common star. It sits in the constellation Cir, shines at apparent magnitude 9.09 and has spectral type B8II.
Its spectrum reads B8II — 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 121903 in the constellation Cir. At apparent magnitude 9.09, a small backyard telescope will bring it into view.
Like any astronomical target, HD 121903 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 121903 scores 21 points on Spacedle's rarity scale, which places it in the common tier. Another 1 point would lift it into a rarer tier.
That score comes from 3 science badges — Star, Hot blue B-type star and Bright giant — 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.