RA 45.2120° · Dec -2.8786° · star
3 more points to reach Rare.
7 Eri is an uncommon variable star. It lies about 832 light-years from Earth, sits in the constellation Eri, shines at apparent magnitude 6.11 and has spectral type M2III.
Its spectrum reads M2III — 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 7 Eri in the constellation Eri. At apparent magnitude 6.11, it is an easy target for binoculars.
Like any astronomical target, 7 Eri 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.
7 Eri scores 31 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 3 points would lift it into a rarer tier.
That score comes from 6 science badges — Variable star, Cool red M-type star, Giant star, Deep red star, Gently variable and A named variable 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.