RA 240.0305° · Dec -38.3967° · star
13 more points to reach Epic.
Eta Lup is a rare star. It lies about 441.9 light-years from Earth, sits in the constellation Lup, shines at apparent magnitude 3.42 and has spectral type B2.5IV.
Its spectrum reads B2.5IV — 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 Eta Lup in the constellation Lup. At apparent magnitude 3.42, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, Eta Lup 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.
Eta Lup scores 37 points on Spacedle's rarity scale, which places it in the rare tier. Another 13 points would lift it into a rarer tier.
That score comes from 6 science badges — Star, Naked-eye visible, Hot blue B-type star, Subgiant (leaving the main sequence), Blue-white star and Intrinsically luminous (Mv < −2) — 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.