WASP-5b: a dense, very hot Jupiter transiting a 12th-mag Southern-hemisphere star

D. R. Anderson, M. Gillon, C. Hellier, P. F. L. Maxted, F. Pepe, D. Queloz, D. M. Wilson, A. Collier Cameron, B. Smalley, T. A. Lister, S. J. Bentley, A. Blecha, D. J. Christian, B. Enoch, L. Hebb, K. Horne, J. Irwin, Y. C. Joshi, S. R. Kane, M. MarmierM. Mayor, N. R. Parley, D. L. Pollacco, F. Pont, R. Ryans, D. Segransan, I. Skillen, R. A. Street, S. Udry, R. G. West, P. J. Wheatley

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)


We report the discovery of WASP-5b, a Jupiter-mass planet orbiting a 12th-mag G-type star in the Southern hemisphere. The 1.6-d orbital period places WASP-5b in the class of very hot Jupiters and leads to a predicted equilibrium temperature of 1750 K. WASP-5b is the densest of any known Jovian-mass planet, being a factor of 7 denser than TrES-4, which is subject to similar stellar insolation, and a factor of 3 denser than WASP-4b, which has a similar orbital period. We present transit photometry and radial velocity measurements of WASP-5 (= USNO-B1 0487.0799749), from which we derive the mass, radius and density of the planet: MP = 1.58(-0.08)(+0.13) M-J, R-P = 1.090(-0.058)(+0.094) R-J and rho P = 1.22(-0.24)(+0.19) rho J. The orbital period is P = 1.6284296(-0.0000037)(+0.0000048) d and the mid-transit epoch is T-C (HJD) = 245 4375.62466(-0.00025)(+0.00026).

Original languageEnglish
Pages (from-to)L4-L7
Number of pages4
JournalMonthly Notices of the Royal Astronomical Society
Issue number1
Early online date3 Apr 2008
Publication statusPublished - 11 Jun 2008


  • stars: individual: WASP-5
  • planetary systems
  • MASS


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