RA 349.3682° · Dec -16.1722° · star
15 more points to reach Epic.
HD 219639 is a rare star. It lies about 1,639 light-years from Earth, sits in the constellation Aqr, shines at apparent magnitude 6.72 and has spectral type B5II/III.
Its spectrum reads B5II/III — 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 219639 in the constellation Aqr. At apparent magnitude 6.72, it is an easy target for binoculars.
Like any astronomical target, HD 219639 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 219639 scores 35 points on Spacedle's rarity scale, which places it in the rare tier. Another 15 points would lift it into a rarer tier.
That score comes from 6 science badges — Star, Distant (over 1,000 light-years), On the zodiac, Hot blue B-type star, Bright giant and Blue-white 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.