RA 272.8534° · Dec -38.1963° · star
4 more points to reach Common.
HD 166220 is a trash star. It lies about 748.1 light-years from Earth, sits in the constellation CrA, shines at apparent magnitude 8.77 and has spectral type F0IV.
Its spectrum reads F0IV — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Look for HD 166220 in the constellation CrA. At apparent magnitude 8.77, it is an easy target for binoculars.
Like any astronomical target, HD 166220 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 166220 scores 11 points on Spacedle's rarity scale, which places it in the trash 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 Subgiant (leaving the main sequence) — 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.