RA 299.0766° · Dec 35.0834° · star
2 more points to reach Uncommon.
21Eta Cyg is a common star. It lies about 134.9 light-years from Earth, sits in the constellation Cyg, shines at apparent magnitude 3.89 and has spectral type K0IIIvar.
Its spectrum reads K0IIIvar — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
Look for 21Eta Cyg in the constellation Cyg. At apparent magnitude 3.89, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, 21Eta Cyg 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.
21Eta Cyg scores 20 points on Spacedle's rarity scale, which places it in the common tier. Another 2 points would lift it into a rarer tier.
That score comes from 4 science badges — Star, Naked-eye visible, Orange K-type star and Giant 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.