RA 240.8892° · Dec -30.1372° · exoplanet
7 more points to reach Anomaly.
HD 143811 AB b is an epic exoplanet. It lies about 445.6 light-years from Earth, shines at apparent magnitude 8.91, has an equilibrium temperature near 1,042 K and spans roughly 15.69 Earth radii.
Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.
At apparent magnitude 8.91, it is an easy target for binoculars.
Like any astronomical target, HD 143811 AB 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 143811 AB b scores 71 points on Spacedle's rarity scale, which places it in the epic tier. Another 7 points would lift it into a rarer tier.
That score comes from 7 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Long-period world, Circumbinary (orbits both stars), Directly imaged and Orbits beyond Neptune's distance — 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.