HD 209458 planetary transits from Hipparcos photometry

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Title:		HD 209458 planetary transits from Hipparcos photometry
Authors:		Robichon, N.; Arenou, F.
Affiliation:		AA(DASGAL, Observatoire de Paris, CNRS UMR 8633, 92195 Meudon CEDEX, France ), AB(DASGAL, Observatoire de Paris, CNRS UMR 8633, 92195 Meudon CEDEX, France )
Publication:		Astronomy and Astrophysics, v.355, p.295-298 (2000) (A&A Homepage)
Publication Date:		03/2000
Origin:		A&A
Astronomy Keywords:		STARS: PLANETARY SYSTEMS, STARS: INDIVIDUAL: HD 209458
Bibliographic Code:		2000A&A...355..295R

Abstract

During its 39-month mission, Hipparcos observed the star {{HD 209458} on 89 occasions. Five of these observations are shown to correspond to epochs of planetary transits, with a 2.3+/-0.4% mean decrease of flux in the Hp band being observed during the transits. As a result of the long temporal baseline of more than 8 years between the Hipparcos and radial velocity measurements, an accurate orbital period of P=3.524739+/- 0.000014 days can be derived from the Hipparcos photometric data. Based on observations made with the ESA Hipparcos astrometry satellite}

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