A smaller radius for the transiting exoplanet wasp-10b

John Asher Johnson, Joshua N. Winn, Nicole E. Cabrera, Joshua A. Carter

Research output: Contribution to journalArticlepeer-review

69 Scopus citations


We present the photometry of WASP-10 during a transit of its short-period Jovian planet. We employed the novel point-spread function shaping capabilities of the Orthogonal Parallel Transfer Imaging Camera mounted on the UH 2.2 m telescope to achieve a photometric precision of 4.7 × 10-4 per 1.3 minute sample. With this new light curve, in conjunction with stellar evolutionary models, we improve on existing measurements of the planetary, stellar, and orbital parameters. We find a stellar radius R = 0.698 0.012 R and a planetary radius RP = 1.080 0.020 R Jup. The quoted errors do not include any possible systematic errors in the stellar evolutionary models. Our measurement improves the precision of the planet's radius by a factor of 4, and revises the previous estimate downward by 16% (2.5σ, where σ is the quadrature sum of the respective confidence limits). Our measured radius of WASP-10b is consistent with previously published theoretical radii for irradiated Jovian planets.

Original languageEnglish (US)
Pages (from-to)L100-L104
JournalAstrophysical Journal
Issue number2
StatePublished - 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Instrumentation: detectors
  • Planetary systems
  • Stars: individual (WASP-10)
  • Techniques: photometric


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