RA 262.8921° · Dec 61.6840° · star
5 more points to reach Common.
HD 159640 is a trash star. It lies about 744.6 light-years from Earth, sits in the constellation Dra, shines at apparent magnitude 7.57 and has spectral type K2.
Its spectrum reads K2 — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
Look for HD 159640 in the constellation Dra. At apparent magnitude 7.57, it is an easy target for binoculars.
Like any astronomical target, HD 159640 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 159640 scores 10 points on Spacedle's rarity scale, which places it in the trash tier. Another 5 points would lift it into a rarer tier.
That score comes from 3 science badges — Star, Never sets (northern circumpolar) and Orange K-type 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.