RA 91.0563° · Dec -6.7089° · star
3 more points to reach Epic.
HR 2142 is a rare variable star. It lies about 1,315.1 light-years from Earth, sits in the constellation Mon, shines at apparent magnitude 5.19 and has spectral type B2Vne+.
Its spectrum reads B2Vne+ — a blue-white B-type star, with a surface tens of thousands of degrees hot and a life measured in tens of millions of years.
Look for HR 2142 in the constellation Mon. At apparent magnitude 5.19, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, HR 2142 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.
HR 2142 scores 47 points on Spacedle's rarity scale, which places it in the rare tier. Another 3 points would lift it into a rarer tier.
That score comes from 9 science badges — Variable star, Distant (over 1,000 light-years), Naked-eye visible, Hot blue B-type star, Main-sequence star, Blue-white star, Intrinsically luminous (Mv < −2) and Barely variable (under 0.05 mag) — 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.