RA 104.3115° · Dec -22.2029° · star
7 more points to reach Epic.
HR 2603 is a rare variable star. It lies about 1,812 light-years from Earth, sits in the constellation CMa, shines at apparent magnitude 6.64 and has spectral type B2III/IV.
Its spectrum reads B2III/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 HR 2603 in the constellation CMa. At apparent magnitude 6.64, it is an easy target for binoculars.
Like any astronomical target, HR 2603 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.
HR 2603 scores 43 points on Spacedle's rarity scale, which places it in the rare tier. Another 7 points would lift it into a rarer tier.
That score comes from 8 science badges — Variable star, Distant (over 1,000 light-years), Hot blue B-type star, Giant star, Blue-white star, Intrinsically luminous (Mv < −2), 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.