RA 261.5722° · Dec -10.9930° · star
15 more points to reach Epic.
HD 157857 is a rare star. It lies about 1,430.5 light-years from Earth, sits in the constellation Ser, shines at apparent magnitude 7.78 and has spectral type O7e.
Its spectrum reads O7e — 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 157857 in the constellation Ser. At apparent magnitude 7.78, it is an easy target for binoculars.
Like any astronomical target, HD 157857 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 157857 scores 35 points on Spacedle's rarity scale, which places it in the rare tier. Another 15 points would lift it into a rarer tier.
That score comes from 3 science badges — Star, Distant (over 1,000 light-years) 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.