RA 235.5872° · Dec -55.3119° · star
3 more points to reach Epic.
HD 139717 is a rare variable star. It sits in the constellation Nor, shines at apparent magnitude 9.26 and has spectral type F8Ib/II.
Its spectrum reads F8Ib/II — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Look for HD 139717 in the constellation Nor. At apparent magnitude 9.26, a small backyard telescope will bring it into view.
Like any astronomical target, HD 139717 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 139717 scores 47 points on Spacedle's rarity scale, which places it in the rare tier. Another 3 points would lift it into a rarer tier.
That score comes from 6 science badges — Variable star, Yellow-white F-type star, Supergiant, Deep red star, Strongly 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.