RA 48.1481° · Dec 59.9197° · star
16 more points to reach Epic.
HD 19644 is a rare variable star. It sits in the constellation Cas, shines at apparent magnitude 8.25 and has spectral type B3II-III.
Its spectrum reads B3II-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 19644 in the constellation Cas. At apparent magnitude 8.25, it is an easy target for binoculars.
Like any astronomical target, HD 19644 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 19644 scores 34 points on Spacedle's rarity scale, which places it in the rare tier. Another 16 points would lift it into a rarer tier.
That score comes from 6 science badges — Variable star, Never sets (northern circumpolar), Hot blue B-type star, Bright giant, 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.