WASP-43b: the closest-orbiting hot Jupiter

C. Hellier, D.~R. Anderson, A. Collier Cameron, M. Gillon, E. Jehin, M. Lendl, P.~F.~L. Maxted, F. Pepe, D. Pollacco, D. Queloz, D. Ségransan, B. Smalley, A.~M.~S. Smith, J. Southworth, A.~H.~M.~J. Triaud, S. Udry, R.~G. West

Research output: Contribution to journalArticlepeer-review

92 Citations (Scopus)


We report the discovery of WASP-43b, a hot Jupiter transiting a K7V star every 0.81 d. At 0.6-M$_⊙$ the host star has the lowest mass of any star currently known to host a hot Jupiter. It also shows a 15.6-d rotation period. The planet has a mass of 1.8 M$_Jup$, a radius of 0.9 R$_Jup$, and with a semi-major axis of only 0.014 AU has the smallest orbital distance of any known hot Jupiter. The discovery of such a planet around a K7V star shows that planets with apparently short remaining lifetimes owing to tidal decay of the orbit are also found around stars with deep convection zones.
Original languageEnglish
Pages (from-to)L7
JournalAstronomy and Astrophysics
Publication statusPublished - 1 Nov 2011


  • stars: individual: WASP-43, planetary systems


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