RA 51.8831° · Dec 5.8704° · star
7 more points to reach Uncommon.
HD 21440 is a common star. It lies about 1,203.5 light-years from Earth, sits in the constellation Tau, shines at apparent magnitude 7.19 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 HD 21440 in the constellation Tau. At apparent magnitude 7.19, it is an easy target for binoculars.
Like any astronomical target, HD 21440 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 21440 scores 15 points on Spacedle's rarity scale, which places it in the common tier. Another 7 points would lift it into a rarer tier.
That score comes from 4 science badges — Star, Distant (over 1,000 light-years), 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.