About this world
HD 135694 b is a sub-Neptune orbiting HD 135694, a yellow, Sun-like star 241 light-years from Earth. It is about 2.9 times the size of Earth and holds 6.1 Earth masses. It completes an orbit every 15.9 days at 0.12 AU from its star, closer than Mercury is to the Sun.
Its equilibrium temperature is about 751 K (478 °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 2023 by transit with Transiting Exoplanet Survey Satellite (TESS). A planet crosses its star and dims it by a tiny, periodic fraction.