HD 80606 b, a planet on an extremely elongated orbit

D. Naef*, D. W. Latham, M. Mayor, T. Mazeh, J. L. Beuzit, G. A. Drukier, C. Perrier-Bellet, D. Queloz, J. P. Sivan, G. Torres, S. Udry, S. Zucker

*Corresponding author for this work

Research output: Contribution to journalLetterpeer-review


We report the detection of a planetary companion orbiting the solar-type star HD 80606, the brighter component of a wide binary with a projected separation of about 2000 AU. Using high-signal spectroscopic observations of the two components of the visual binary, we show that they are nearly identical. The planet has an orbital period of 111.8 days and a minimum mass of 3.9 MJup. With e=0.927, this planet has the highest orbital eccentricity among the extrasolar planets detected so far. We finally list several processes this extreme eccentricity could result from.

Original languageEnglish
Pages (from-to)L27-L30
JournalAstronomy and Astrophysics
Issue number2
StatePublished - 2001


  • Binaries: visual
  • Extrasolar planets
  • Stars: individuals: HD 80606
  • Stars: individuals: HD 80607
  • Techniques: radial velocities


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