RA 189.8155° · Dec -32.7264° · exoplanet
7 more points to reach Rare.
HD 109988 b is an uncommon exoplanet. It lies about 138.7 light-years from Earth, shines at apparent magnitude 8.9, has an equilibrium temperature near 66 K and spans roughly 12.1 Earth radii.
A deep-frozen world, too far from its star's warmth for anything to stay liquid.
At apparent magnitude 8.9, it is an easy target for binoculars.
Like any astronomical target, HD 109988 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 109988 b scores 27 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 7 points would lift it into a rarer tier.
That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Frozen world and Long-period world — 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.