RA 235.1576° · Dec -25.5925° · star
4 more points to reach Common.
HD 139731 is a trash star. It lies about 307.4 light-years from Earth, sits in the constellation Lib, shines at apparent magnitude 7.96 and has spectral type F0V.
Its spectrum reads F0V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Look for HD 139731 in the constellation Lib. At apparent magnitude 7.96, it is an easy target for binoculars.
Like any astronomical target, HD 139731 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 139731 scores 11 points on Spacedle's rarity scale, which places it in the trash tier. Another 4 points would lift it into a rarer tier.
That score comes from 4 science badges — Star, On the zodiac, Yellow-white F-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.