LHS 1478 b
LHS 1478 b is a super-Earth exoplanet orbiting around LHS 1478, a red dwarf star located 59.4 light-years from Earth in the constellation of Cassiopeia. It orbits at a distance of 0.018 AU from the star with a inclination of 87° to the plane of the sky. It takes LHS 1478b roughly 1.9 days to complete an orbit around the star.
It has a mass of 2.27 Earths and a radius of 1.17 Earths. It has a bulk density of 7.7 g cm−3 making it consistent with a terrestrial planet with a composition mainly of Fe and MgSiO3. It is classed as a hot super-Earth with an equilibrium temperature of 585 Kelvin receiving 21 times more energy from its star than Earth does from the Sun. This makes it impossible for water to remain a liquid on the surface suggesting that LHS 1478b may have a Venus-like atmosphere.
The star it orbits around is a fairly inactive red dwarf star allowing for favorable conditions for spectroscopic studies with the James Webb Space Telescope. This places LHS 1478b with a family of small rocky planets where meaningful and realistic measurements with JWST can be taken. JWST observations disfavor the possibility of a low-albedo bare rock, suggesting that the planet either has an atmosphere or a high albedo without an atmosphere.