RA 229.4214° · Dec -5.2025° · exoplanet
11 more points to reach Epic.
HD 135872 b is a rare exoplanet. It lies about 268.8 light-years from Earth, shines at apparent magnitude 7.28, has an equilibrium temperature near 234 K and spans roughly 12.8 Earth radii.
Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.
At apparent magnitude 7.28, it is an easy target for binoculars.
Like any astronomical target, HD 135872 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 135872 b scores 39 points on Spacedle's rarity scale, which places it in the rare tier. Another 11 points would lift it into a rarer tier.
That score comes from 3 science badges — Confirmed exoplanet, In the habitable zone and Gas giant — 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.