On the apparent orbital inclination change of the extrasolar transiting planet TrES-2b

Louis J. Scuderi, Jason A. Dittmann, Jared R. Males, Elizabeth M. Green, Laird M. Close

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


On 2009 June 15 UT the transit of TrES-2b was detected using the University of Arizona's 1.55 m Kuiper Telescope with 2.0-2.5 millimag rms accuracy in the I band. We find a central transit time of Tc = 2454997.76286 0.00035 HJD, an orbital period of P = 2.4706127 0.0000009 days, and an inclination angle of i = 8392 0°.05, which is consistent with our re-fit of the original I-band light curve of O'Donovan etal. where we find i = 8384 0°.05. We calculate an insignificant inclination change of Δi = -008 0°.07 over the last three years, and as such, our observations rule out, at the 11σ level, the apparent change of orbital inclination to i predicted = 8335 0°.1 as predicted by Mislis & Schmitt and Mislis etal. for our epoch. Moreover, our analysis of a recently published Kepler Space Telescope light curve for TrES-2b finds an inclination of i = 8391 003 for a similar epoch. These Kepler results definitively rule out change in i as a function of time. Indeed, we detect no significant changes in any of the orbital parameters of TrES-2b.

Original languageEnglish (US)
Pages (from-to)462-468
Number of pages7
JournalAstrophysical Journal
Issue number1
StatePublished - 2010


  • Planetary systems
  • Stars: individual (TrES-2b)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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