About this world
TOI-712 d is a sub-Neptune orbiting TOI-712, an orange dwarf (type K4.5V) 191 light-years from Earth. It is about 2.5 times the size of Earth. It completes an orbit every 84.8 days at 0.34 AU from its star, closer than Mercury is to the Sun.
Its equilibrium temperature is about 314 K (40 °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 2022 by transit with Transiting Exoplanet Survey Satellite (TESS). A planet crosses its star and dims it by a tiny, periodic fraction. TOI-712 has 3 known planets; the others are TOI-712 b and TOI-712 c.