RA 270.5981° · Dec -23.0308° · star
1 more point to reach Epic.
HD 164492 is a rare variable star. It sits in the constellation Sgr, shines at apparent magnitude 7.22 and has spectral type O6....
Its spectrum reads O6... — 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 HD 164492 in the constellation Sgr. At apparent magnitude 7.22, it is an easy target for binoculars.
Like any astronomical target, HD 164492 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.
HD 164492 scores 49 points on Spacedle's rarity scale, which places it in the rare tier. Another 1 point would lift it into a rarer tier.
That score comes from 6 science badges — Variable star, Toward the galactic centre, On the zodiac, Blazing O-type star, Gently variable 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.