RA 315.3097° · Dec 43.7218° · star
11 more points to reach Rare.
HD 200311 is an uncommon variable star. It lies about 767.4 light-years from Earth, sits in the constellation Cyg, shines at apparent magnitude 7.7 and has spectral type B9p.
Its spectrum reads B9p — 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 HD 200311 in the constellation Cyg. At apparent magnitude 7.7, it is an easy target for binoculars.
Like any astronomical target, HD 200311 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.
HD 200311 scores 23 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 11 points would lift it into a rarer tier.
That score comes from 5 science badges — Variable star, Hot blue B-type star, Blue-white 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.