RA 69.9257° · Dec -11.4462° · star
10 more points to reach Rare.
HIP 21709 is an uncommon star. It sits in the constellation Eri, shines at apparent magnitude 9.72 and has spectral type M2V.
Its spectrum reads M2V — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.
Look for HIP 21709 in the constellation Eri. At apparent magnitude 9.72, a small backyard telescope will bring it into view.
Like any astronomical target, HIP 21709 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.
HIP 21709 scores 24 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 10 points would lift it into a rarer tier.
That score comes from 5 science badges — Star, Cool red M-type star, Main-sequence star, Deep red star and Red dwarf — 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.