RA 52.0575° · Dec -41.0307° · star
6 more points to reach Uncommon.
HD 21658 is a common star. It lies about 225.1 light-years from Earth, sits in the constellation Eri, shines at apparent magnitude 9.29 and has spectral type G8IV/V.
Its spectrum reads G8IV/V — a G-type star: the very same spectral class as our own Sun.
Look for HD 21658 in the constellation Eri. At apparent magnitude 9.29, a small backyard telescope will bring it into view.
Like any astronomical target, HD 21658 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 21658 scores 16 points on Spacedle's rarity scale, which places it in the common tier. Another 6 points would lift it into a rarer tier.
That score comes from 3 science badges — Star, Sun-like G-type star and Subgiant (leaving the main sequence) — 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.