RA 320.5618° · Dec -16.8345° · exoplanet
14 more points to reach Epic.
HD 203387 b is a rare exoplanet. It lies about 201.4 light-years from Earth, shines at apparent magnitude 4.28, has an equilibrium temperature near 610 K and spans roughly 13.1 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 4.28, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, HD 203387 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 203387 b scores 36 points on Spacedle's rarity scale, which places it in the rare tier. Another 14 points would lift it into a rarer tier.
That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Eccentric orbit, Multi-planet system 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.