RA 301.4159° · Dec 35.6078° · star
9 more points to reach Epic.
HD 190864 is a rare star. It lies about 1,591 light-years from Earth, sits in the constellation Cyg, shines at apparent magnitude 7.78 and has spectral type O7III....
Its spectrum reads O7III... — an O-type star — the hottest, rarest main class there is. Fewer than one star in a million is an O, and none of them lasts long.
Look for HD 190864 in the constellation Cyg. At apparent magnitude 7.78, it is an easy target for binoculars.
Like any astronomical target, HD 190864 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 190864 scores 41 points on Spacedle's rarity scale, which places it in the rare tier. Another 9 points would lift it into a rarer tier.
That score comes from 4 science badges — Star, Distant (over 1,000 light-years), Blazing O-type star and Giant 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.