RA 315.3880° · Dec 1.5041° · star
6 more points to reach Uncommon.
HD 200138 is a common star. It sits in the constellation Aqr, shines at apparent magnitude 8.22 and has spectral type A0.
Its spectrum reads A0 — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.
Look for HD 200138 in the constellation Aqr. At apparent magnitude 8.22, it is an easy target for binoculars.
Like any astronomical target, HD 200138 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 200138 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, On the zodiac, White A-type star and Blue-white 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.