RA 189.9689° · Dec -39.9873° · star
16 more points to reach Epic.
HR 4817 is a rare star. It lies about 364.8 light-years from Earth, sits in the constellation Cen, shines at apparent magnitude 4.63 and has spectral type B8II/III.
Its spectrum reads B8II/III — 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 4817 in the constellation Cen. At apparent magnitude 4.63, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, HR 4817 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 4817 scores 34 points on Spacedle's rarity scale, which places it in the rare tier. Another 16 points would lift it into a rarer tier.
That score comes from 5 science badges — Star, Naked-eye visible, Hot blue B-type star, Bright giant and Blue-white 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.