Ground-based multisite observations of two transits of HD 80606b

A. Shporer, J. N. Winn, S. Dreizler, K. D. Colón, W. M. Wood-Vasey, P. I. Choi, C. Morley, C. Moutou, W. F. Welsh, D. Pollaco, D. Starkey, E. Adams, S. C.C. Barros, F. Bouchy, A. Cabrera-Lavers, S. Cerutti, L. Coban, K. Costello, H. Deeg, R. F. DíazG. A. Esquerdo, J. Fernandez, S. W. Fleming, E. B. Ford, B. J. Fulton, M. Good, G. Hébrard, M. J. Holman, M. Hunt, S. Kadakia, G. Lander, M. Lockhart, T. Mazeh, R. C. Morehead, B. E. Nelson, L. Nortmann, F. Reyes, E. Roebuck, A. R. Rudy, R. Ruth, E. Simpson, C. Vincent, G. Weaver, J. W. Xie

Research output: Contribution to journalArticlepeer-review


We present ground-based optical observations of the 2009 September and 2010 January transits of HD 80606b. Based on three partial light curves of the 2009 September event, we derive a midtransit time of Tc [HJD] = 2455099.196 ± 0.026, which is about 1s away from the previously predicted time. We observed the 2010 January event from nine different locations, with most phases of the transit being observed by at least three different teams. We determine a midtransit time of Tc [HJD] = 2455210.6502 ± 0.0064, which is within 1.3s of the time derived from a Spitzer observation of the same event.

Original languageEnglish
Pages (from-to)880-887
Number of pages8
JournalAstrophysical Journal
Issue number1
StatePublished - 10 Oct 2010


  • Planetary systems
  • Stars: individual (HD 80606)


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