RA 52.3569° · Dec -19.5544° · star
5 more points to reach Uncommon.
HD 21689 is a common star. It lies about 979.4 light-years from Earth, sits in the constellation Eri, shines at apparent magnitude 7.28 and has spectral type G8/K0III.
Its spectrum reads G8/K0III — a G-type star: the very same spectral class as our own Sun.
Look for HD 21689 in the constellation Eri. At apparent magnitude 7.28, it is an easy target for binoculars.
Like any astronomical target, HD 21689 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 21689 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 3 science badges — Star, Sun-like G-type star and Giant 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.