RA 249.0940° · Dec -42.8589° · star
39 more points to reach Mythic.
HR 6164 is an anomaly variable star. It lies about 1,359 light-years from Earth, sits in the constellation Sco, shines at apparent magnitude 5.46 and has spectral type O9Ia.
Its spectrum reads O9Ia — an O-type star — the hottest, rarest main class there is. Fewer than one star in a million is an O, and none of them lasts long.
Look for HR 6164 in the constellation Sco. At apparent magnitude 5.46, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, HR 6164 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 6164 scores 81 points on Spacedle's rarity scale, which places it in the anomaly tier. Another 39 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, On the zodiac, Blazing O-type star, Supergiant, 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.