About this world
TCP J05074264+2447555 b is a Neptune-like planet orbiting TCP J05074264+2447555, a yellow, Sun-like star 1.65 thousand light-years from Earth. It is about 4.7 times the size of Earth (its size estimated from its mass) and holds 20 Earth masses.
Its equilibrium temperature is about 345 K (71 °C): too cold for liquid water on its surface. At its size it almost certainly keeps a deep envelope of hydrogen and helium.
It was discovered in 2018 by microlensing with Multiple Observatories. A foreground star's gravity magnifies a background star; a planet adds a blip.