RA 104.4891° · Dec -23.8840° · star
1 more point to reach Uncommon.
HD 51821 is a common star. It lies about 1,038.7 light-years from Earth, sits in the constellation CMa, shines at apparent magnitude 9.97 and has spectral type A0V.
Its spectrum reads A0V — 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 51821 in the constellation CMa. At apparent magnitude 9.97, a small backyard telescope will bring it into view.
Like any astronomical target, HD 51821 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 51821 scores 21 points on Spacedle's rarity scale, which places it in the common tier. Another 1 point would lift it into a rarer tier.
That score comes from 5 science badges — Star, Distant (over 1,000 light-years), White A-type star, Main-sequence 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.