About this world
HD 86226 c is a sub-Neptune orbiting HD 86226, a yellow, Sun-like star (type G1V) 149 light-years from Earth. It is about 2.2 times the size of Earth and holds 7.3 Earth masses. It completes an orbit every 3.98 days at 0.049 AU from its star, closer than Mercury is to the Sun.
Its equilibrium temperature is about 1,311 K (1,038 °C): far too hot for liquid water on its surface. By the "cosmic shoreline", its star has probably stripped its atmosphere away, leaving bare rock. Its atmosphere has already been studied: 3 spectroscopic observations, all of them with the James Webb Space Telescope.
It was discovered in 2020 by transit with Transiting Exoplanet Survey Satellite (TESS). A planet crosses its star and dims it by a tiny, periodic fraction. HD 86226 has 2 known planets; the others are HD 86226 b.