RA 272.3386° · Dec 9.1510° · star
11 more points to reach Rare.
HD 166231 is an uncommon variable star. It lies about 449.3 light-years from Earth, sits in the constellation Oph, shines at apparent magnitude 9.04 and has spectral type F8V.
Its spectrum reads F8V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Look for HD 166231 in the constellation Oph. At apparent magnitude 9.04, a small backyard telescope will bring it into view.
Like any astronomical target, HD 166231 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 166231 scores 23 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 11 points would lift it into a rarer tier.
That score comes from 5 science badges — Variable star, Yellow-white F-type star, Main-sequence star, Strongly variable and A named variable 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.