Wasp-7: A bright transiting-exoplanet system in the southern hemisphere

Coel Hellier, D. R. Anderson, M. Gillon, T. A. Lister, P. F L Maxted, D. Queloz, B. Smalley, A. H M J Triaud, R. G. West, D. M. Wilson, Khalid Al-Subai, S. J. Bentley, A. Collier Cameron, L. Hebb, K. Horne, J. Irwin, S. R. Kane, M. Mayor, F. Pepe, D. PollaccoI. Skillen, S. Udry, P. J. Wheatley, D. J. Christian, R. Enoch, C. A. Haswell, Y. C. Joshi, A. J. Norton, N. Parley, R. Ryans, R. A. Street, I. Todd

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We report that a Jupiter-mass planet, WASP-7b, transits the ν=9.5 star HD 197286 every 4.95 d. This is the brightest discovery from the WASP-South transit survey so far and is currently the brightest transiting-exoplanet system in the southern hemisphere. WASP-7b is among the densest of the known Jupiter-mass planets, suggesting that it has a massive core. The planet mass is 0.96+-00.1128 MJup, the radius is 0.915+-00..004460 RJup, and the density is 1.26+-00.2251 ρJup (1.67+-003238 gcm-3).

Original languageEnglish
JournalAstrophysical Journal
Issue number1 PART 2
Publication statusPublished - 8 Jul 2009
Externally publishedYes



  • Hd 197286)-planetary systems
  • Stars: individual (wasp-7

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Hellier, C., Anderson, D. R., Gillon, M., Lister, T. A., Maxted, P. F. L., Queloz, D., Smalley, B., Triaud, A. H. M. J., West, R. G., Wilson, D. M., Al-Subai, K., Bentley, S. J., Cameron, A. C., Hebb, L., Horne, K., Irwin, J., Kane, S. R., Mayor, M., Pepe, F., ... Todd, I. (2009). Wasp-7: A bright transiting-exoplanet system in the southern hemisphere. Astrophysical Journal, 690(1 PART 2). https://doi.org/10.1088/0004-637X/690/1/L89