RA 273.8038° · Dec -20.7283° · star
4 more points to reach Epic.
15 Sgr is a rare star. It sits in the constellation Sgr, shines at apparent magnitude 5.29 and has spectral type B0/1Ia/ab.
Its spectrum reads B0/1Ia/ab — 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 15 Sgr in the constellation Sgr. At apparent magnitude 5.29, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, 15 Sgr 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.
15 Sgr scores 46 points on Spacedle's rarity scale, which places it in the rare tier. Another 4 points would lift it into a rarer tier.
That score comes from 6 science badges — Star, Naked-eye visible, Toward the galactic centre, On the zodiac, Hot blue B-type star and Supergiant — 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.