Description
We report the discovery by the WASP transit survey of a giant planet in a close orbit (0.0295+/-0.0009AU) around a moderately bright (V=11.6, K=10) G9 dwarf (0.89+/-0.08M_{sun}_, 0.84+/-0.03R_{sun}_) in the Southern constellation Eridanus. Thanks to high-precision follow-up photometry and spectroscopy obtained by the telescopes TRAPPIST and Euler, the mass and size of this planet, WASP-50 b, are well constrained to 1.47+/-0.09M_Jup_ and 1.15+/-0.05R_Jup_, respectively. The transit ephemeris is 2455558.6120(+/-0.0002)+Nx1.955096(+/-0.000005) HJD_UTC_. The size of the planet is consistent with basic models of irradiated giant planets.
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