RA 28.3825° · Dec 19.2939° · star
11 more points to reach Epic.
Mesarthim is a rare variable star. It lies about 164.1 light-years from Earth, sits in the constellation Ari, shines at apparent magnitude 3.88 and has spectral type A1p Si.
Its spectrum reads A1p Si — 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 Mesarthim in the constellation Ari. At apparent magnitude 3.88, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, Mesarthim 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.
Mesarthim scores 39 points on Spacedle's rarity scale, which places it in the rare tier. Another 11 points would lift it into a rarer tier.
That score comes from 8 science badges — Variable star, Naked-eye visible, Has a proper name, On the zodiac, White A-type star, Blue-white star, Barely variable (under 0.05 mag) 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.