* Astronomy

Title: HAT-P-5b: A Jupiter-like hot Jupiter Transiting a Bright Star
Authors: G. A. Bakos (1,2), A. Shporer (3), A. Pal (4,1), G. Torres (1), Geza Kovacs (5), D. W. Latham (1), T. Mazeh (3), A. Ofir (3), R. W. Noyes (1), D. D. Sasselov (1), F. Bouchy (7), F. Pont (6), D. Queloz (6), S. Udry (6), G. Esquerdo (1), B. Sipocz (4,1), Gabor Kovacs (1), J. Lazar (8), I. Papp (8), P. Sari (8), ((1) Harvard-Smithsonian Center for Astrophysics, (2) Hubble Fellow. (3) Wise Observatory, Tel Aviv University (4) Department of Astronomy, Eötvös Loránd University, Budapest (5) Konkoly Observatory, Budapest (6) Observatoire Astronomique de l'Universite de Geneve, (7) Institut d'Astrophysique de Paris (8) Hungarian Astronomical Association)

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 centre of transit is Tc = 2,454,241.77663 ± 0.00022 (HJD), and the total transit duration is 0.1217 ± 0.0012 days.

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