RA 290.6070° · Dec -31.9366° · star
2 more points to reach Epic.
HD 181620 is a rare variable star. It lies about 1,744.1 light-years from Earth, sits in the constellation Sgr, shines at apparent magnitude 6.94 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 HD 181620 in the constellation Sgr. At apparent magnitude 6.94, it is an easy target for binoculars.
Like any astronomical target, HD 181620 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 181620 scores 48 points on Spacedle's rarity scale, which places it in the rare tier. Another 2 points would lift it into a rarer tier.
That score comes from 9 science badges — Variable star, Distant (over 1,000 light-years), Toward the galactic centre, On the zodiac, Cool red M-type star, Giant star, Deep red star and Gently variable — 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.