RA 81.1631° · Dec 37.3853° · star
6 more points to reach Rare.
21Sig Aur is an uncommon star. It lies about 467.3 light-years from Earth, sits in the constellation Aur, shines at apparent magnitude 5.02 and has spectral type K4III.
Its spectrum reads K4III — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
Look for 21Sig Aur in the constellation Aur. At apparent magnitude 5.02, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, 21Sig Aur 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.
21Sig Aur scores 28 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 6 points would lift it into a rarer tier.
That score comes from 5 science badges — Star, Naked-eye visible, Orange K-type star, Giant star and Deep red 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.