RA 264.4613° · Dec -8.1188° · star
11 more points to reach Epic.
57Mu Oph is a rare star. It lies about 755 light-years from Earth, sits in the constellation Oph, shines at apparent magnitude 4.58 and has spectral type B8II-IIIMNp.
Its spectrum reads B8II-IIIMNp — 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 57Mu Oph in the constellation Oph. At apparent magnitude 4.58, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, 57Mu Oph 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.
57Mu Oph 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 5 science badges — Star, Naked-eye visible, Hot blue B-type star, Bright giant and Intrinsically luminous (Mv < −2) — 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.