RA 17.0622° · Dec 54.9203° · star
7 more points to reach Epic.
30Mu Cas is a rare star. It lies about 24.6 light-years from Earth, sits in the constellation Cas, shines at apparent magnitude 5.17 and has spectral type G5Vp.
It is a binary: two stars orbiting a shared centre of mass. More than half of all the 'stars' you can see are actually multiple systems.
Look for 30Mu Cas in the constellation Cas. At apparent magnitude 5.17, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, 30Mu Cas 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.
30Mu Cas scores 43 points on Spacedle's rarity scale, which places it in the rare tier. Another 7 points would lift it into a rarer tier.
That score comes from 7 science badges — Star, Nearby (<25 ly), Naked-eye visible, Binary star, Never sets (northern circumpolar), Sun-like G-type star and Main-sequence 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.