RA 304.7070° · Dec 46.3222° · star
9 more points to reach Epic.
HR 7777 is a rare variable star. It lies about 2,588.5 light-years from Earth, sits in the constellation Cyg, shines at apparent magnitude 6.46 and has spectral type B2V.
Its spectrum reads B2V — 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 HR 7777 in the constellation Cyg. At apparent magnitude 6.46, it is an easy target for binoculars.
Like any astronomical target, HR 7777 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.
HR 7777 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 8 science badges — Variable star, Distant (over 1,000 light-years), Hot blue B-type star, Main-sequence star, Blue-white star, Intrinsically luminous (Mv < −2), 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.