About this world
LTT 1445 A c is an Earth-sized planet orbiting LTT 1445 A, a cool red dwarf (type M3.0) 22.4 light-years from Earth. It is about 1.1 times the size of Earth and holds 1.5 Earth masses. It completes an orbit every 3.12 days at 0.027 AU from its star, closer than Mercury is to the Sun, on a strongly elongated orbit (e = 0.22).
Its equilibrium temperature is about 508 K (235 °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: 4 spectroscopic observations, all of them with the James Webb Space Telescope.
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. LTT 1445 A has 2 known planets; the others are LTT 1445 A b.