About this world
GJ 3082 b is a sub-Neptune orbiting GJ 3082, a cool red dwarf (type M4) 54.2 light-years from Earth. It is about 2.8 times the size of Earth (its size estimated from its mass), with at least 8.2 Earth masses (a minimum, measured by radial velocity). It completes an orbit every 11.9 days at 0.079 AU from its star, closer than Mercury is to the Sun, on a strongly elongated orbit (e = 0.22).
Its equilibrium temperature is about 458 K (184 °C): far too hot for liquid water on its surface. At its size it almost certainly keeps a deep envelope of hydrogen and helium.
It was discovered in 2020 by radial velocity with Multiple Facilities. The star wobbles toward and away from us, Doppler-shifting its spectrum.