RA 24.0678° · Dec 59.4593° · star
6 more points to reach Uncommon.
HD 9666 is a common star. It lies about 398.7 light-years from Earth, sits in the constellation Cas, shines at apparent magnitude 7.73 and has spectral type F5III.
Its spectrum reads F5III — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Look for HD 9666 in the constellation Cas. At apparent magnitude 7.73, it is an easy target for binoculars.
Like any astronomical target, HD 9666 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 9666 scores 16 points on Spacedle's rarity scale, which places it in the common tier. Another 6 points would lift it into a rarer tier.
That score comes from 4 science badges — Star, Never sets (northern circumpolar), Yellow-white F-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.