LHS 475 b: A Potential Venus Analog Orbiting a Nearby M Dwarf

Based on photometric observations by TESS, we present the discovery of a potential Venus analog transiting LHS 475, an M3 dwarf located 12.5 pc from the Sun. The mass of the star is 0.274 +/- 0.015 M-circle dot. The planet, originally reported as TOI 910.01, has an orbital period of 2.0291010 +/- 0.0000017 days and an estimated radius of 0.975 +/- 0.058 R-circle plus. We confirm the validity and source of the transit signal with MEarth and Las Cumbres Observatory Global Telescope ground-based follow-up photometry. We present radial velocity data from CHIRON that rule out massive companions. In accordance with the observed mass-radius distribution of exoplanets as well as planet formation theory, we expect this planetary companion to be terrestrial, with an estimated radial velocity semiamplitude of 1.1 m s(-1). LHS 475 b is likely too hot to be habitable but is a suitable candidate for emission and transmission spectroscopy.