HAT-P-5b: A Jupiter-like hot Jupiter Transiting a Bright Star

astro-ph

/ Authors

G. A. Bakos, A. Shporer, A. Pal, G. Torres, Geza Kovacs, D. W. Latham, T. Mazeh, A. Ofir, R. W. Noyes, D. D. Sasselov

and 10 more authors

F. Bouchy, F. Pont, D. Queloz, S. Udry, G. Esquerdo, B. Sipocz, Gabor Kovacs, J. Lazar, I. Papp, P. Sari

/ Abstract

We report the discovery of a planet transiting a moderately bright (V = 12.00) G star, with an orbital period of 2.788491 +/-0.000025 days. From the transit light curve we determine that the radius of the planet is Rp = 1.257 +/- 0.053 RJup. HAT-P-5b has a mass of Mp = 1.06 +/- 0.11 MJup, similar to the average mass of previously-known transiting exoplanets, and a density of rho = 0.66 +/- 0.11 g cm^-3 . We find that the center of transit is Tc = 2,454,241.77663 +/- 0.00022 (HJD), and the total transit duration is 0.1217 +/- 0.0012 days.