RA 353.6438° · Dec -70.9631° · star
7 more points to reach Common.
HD 221638 is a trash star. It lies about 161.5 light-years from Earth, sits in the constellation Tuc, shines at apparent magnitude 7.55 and has spectral type F6V.
Its spectrum reads F6V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Look for HD 221638 in the constellation Tuc. At apparent magnitude 7.55, it is an easy target for binoculars.
Like any astronomical target, HD 221638 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 221638 scores 8 points on Spacedle's rarity scale, which places it in the trash tier. Another 7 points would lift it into a rarer tier.
That score comes from 3 science badges — Star, Yellow-white F-type star and Main-sequence 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.