RA 331.4253° · Dec 35.3485° · star
5 more points to reach Rare.
HD 209872 is an uncommon variable star. It lies about 762 light-years from Earth, sits in the constellation Peg, shines at apparent magnitude 8.79 and has spectral type M7.
Its spectrum reads M7 — 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 HD 209872 in the constellation Peg. At apparent magnitude 8.79, it is an easy target for binoculars.
Like any astronomical target, HD 209872 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 209872 scores 29 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 5 points would lift it into a rarer tier.
That score comes from 5 science badges — Variable star, Cool red M-type star, Red dwarf, Strongly 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.