RA 295.6510° · Dec 28.3482° · star
4 more points to reach Uncommon.
HD 186309 is a common star. It lies about 643.3 light-years from Earth, sits in the constellation Cyg, shines at apparent magnitude 8.24 and has spectral type F2II.
Its spectrum reads F2II — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Look for HD 186309 in the constellation Cyg. At apparent magnitude 8.24, it is an easy target for binoculars.
Like any astronomical target, HD 186309 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 186309 scores 18 points on Spacedle's rarity scale, which places it in the common tier. Another 4 points would lift it into a rarer tier.
That score comes from 3 science badges — Star, Yellow-white F-type star and Bright giant — 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.