TESS Discovery of an ultra-short-period planet around the nearby M dwarf LHS 3844

Data from the newly-commissioned textit{Transiting Exoplanet Survey Satellite} (TESS) has revealed a hot Earth around LHS 3844, an M dwarf located 15 pc away. The planet has a radius of $1.32pm 0.02$ $R_oplus$ and orbits the star every 11 hours. Although the existence of an atmosphere around such a strongly irradiated planet is questionable, the star is bright enough ($I=11.9$, $K=9.1$) for this possibility to be investigated with transit and occultation spectroscopy. The stars brightness and the planets short period will also facilitate the measurement of the planets mass through Doppler spectroscopy.