RA 142.1666° · Dec 45.6009° · exoplanet
1 more point to reach Uncommon.
HD 81688 b is a common exoplanet. It lies about 279.6 light-years from Earth, shines at apparent magnitude 5.4, has spectral type K0 III-IV and has an equilibrium temperature near 959 K.
Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.
At apparent magnitude 5.4, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, HD 81688 b 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 81688 b scores 21 points on Spacedle's rarity scale, which places it in the common tier. Another 1 point would lift it into a rarer tier.
That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Its star is visible to the naked eye — 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.