RA 313.3094° · Dec 2.4500° · star
2 more points to reach Rare.
HD 198864 is an uncommon star. It lies about 360.4 light-years from Earth, sits in the constellation Aqr, shines at apparent magnitude 8.63 and has spectral type O8.5.
Its spectrum reads O8.5 — 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 198864 in the constellation Aqr. At apparent magnitude 8.63, it is an easy target for binoculars.
Like any astronomical target, HD 198864 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 198864 scores 32 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 2 points would lift it into a rarer tier.
That score comes from 3 science badges — Star, On the zodiac and Blazing O-type 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.