RA 229.4896° · Dec 83.8595° · star
3 more points to reach Uncommon.
HD 138818 is a common variable star. It lies about 336.9 light-years from Earth, sits in the constellation UMi, shines at apparent magnitude 7.74 and has spectral type F0.
Its spectrum reads F0 — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Look for HD 138818 in the constellation UMi. At apparent magnitude 7.74, it is an easy target for binoculars.
Like any astronomical target, HD 138818 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 138818 scores 19 points on Spacedle's rarity scale, which places it in the common tier. Another 3 points would lift it into a rarer tier.
That score comes from 5 science badges — Variable star, Never sets (northern circumpolar), Yellow-white F-type star, Gently 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.