RA 277.2032° · Dec 23.1439° · exoplanet
13 more points to reach Epic.
ZTF J1828+2308 b is a rare exoplanet. It lies about 658.3 light-years from Earth, shines at apparent magnitude 18.04, spans roughly 11.13 Earth radii and weighs about 6,356.57 Earth masses.
It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.
At apparent magnitude 18.04, it takes a larger telescope or a long-exposure image to capture.
Like any astronomical target, ZTF J1828+2308 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.
ZTF J1828+2308 b scores 37 points on Spacedle's rarity scale, which places it in the rare tier. Another 13 points would lift it into a rarer tier.
That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Ultra-short period and Orbits a hot blue-white star — 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.