RA 52.1615° · Dec -61.1895° · star
4 more points to reach Uncommon.
HD 21901 is a common star. It lies about 702.9 light-years from Earth, sits in the constellation Ret, shines at apparent magnitude 8.33 and has spectral type K1II.
Its spectrum reads K1II — 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 21901 in the constellation Ret. At apparent magnitude 8.33, it is an easy target for binoculars.
Like any astronomical target, HD 21901 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 21901 scores 18 points on Spacedle's rarity scale, which places it in the common tier. Another 4 points would lift it into a rarer tier.
That score comes from 3 science badges — Star, Orange K-type star and Bright giant — 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.