RA 290.6679° · Dec -20.6429° · star
2 more points to reach Rare.
HD 181809 is an uncommon variable star. It lies about 259.7 light-years from Earth, sits in the constellation Sgr, shines at apparent magnitude 6.72 and has spectral type K2IIICNpvar.
Its spectrum reads K2IIICNpvar — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
Look for HD 181809 in the constellation Sgr. At apparent magnitude 6.72, it is an easy target for binoculars.
Like any astronomical target, HD 181809 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 181809 scores 32 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 2 points would lift it into a rarer tier.
That score comes from 7 science badges — Variable star, Toward the galactic centre, On the zodiac, Orange K-type star, Giant 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.