RA 33.1564° · Dec 24.1678° · star
5 more points to reach Uncommon.
HR 644 is a common star. It lies about 746.4 light-years from Earth, sits in the constellation Ari, shines at apparent magnitude 5.96 and has spectral type K0.
Its spectrum reads K0 — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
Look for HR 644 in the constellation Ari. At apparent magnitude 5.96, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, HR 644 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 644 scores 17 points on Spacedle's rarity scale, which places it in the common tier. Another 5 points would lift it into a rarer tier.
That score comes from 4 science badges — Star, Naked-eye visible, On the zodiac 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.