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Exoplanet HAT-P-11b Secondary Transit ObservationsWe have conducted secondary eclipse observations of exoplanet HAT--11b, recently discovered by proposal G. Bakos and his colleagues. HAT-P-11b is the smallest transiting extrasolar planet yet found and one of only two known exo-Neptunes. We have observed the system at 3.6 microns for a period of 22 hours centered on the anticipated secondary eclipse time, to detect the eclipse and determine its phase. Once the secondary eclipse is located through analysis of the data, we will make a more focused series of observations in both the 3.6 and 4.5 micron bands to fully characterize it. HAT-P-1lb has a period of 4.8878 days, radius of 0.422 RJ, mass of 0.081 MJ and semi major axis 0.053 AU. Measurements of the secondary eclipse will clarify two key issues; 1) the planetary brightness temperature and the nature of its atmosphere, and 2) the eccentricity of its orbit, with implications for its dynamical evolution. A precise determination of the orbit phase for the secondary eclipse will also be of great utility for Kepler observations of this system at visible wavelengths.
Document ID
20100019277
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Barry, Richard K., Jr.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2010
Subject Category
Astrophysics
Meeting Information
Meeting: Exoplanet HAT-P-11b Secondary Transit Observations
Location: Nice
Country: France
Start Date: August 23, 2010
End Date: August 27, 2010
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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