RA 246.7560° · Dec -18.4563° · star
6 more points to reach Rare.
7Chi Oph is an uncommon variable star. It lies about 525.2 light-years from Earth, sits in the constellation Oph, shines at apparent magnitude 4.22 and has spectral type B2Vne.
Its spectrum reads B2Vne — 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 7Chi Oph in the constellation Oph. At apparent magnitude 4.22, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, 7Chi 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.
7Chi Oph scores 28 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 6 points would lift it into a rarer tier.
That score comes from 6 science badges — Variable star, Naked-eye visible, Hot blue B-type star, Main-sequence star, Gently variable 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.