EDP Sciences
Free access
Issue
A&A
Volume 507, Number 3, December I 2009
Page(s) 1675 - 1686
Section Celestial mechanics and astrometry
DOI http://dx.doi.org/10.1051/0004-6361/200911755
Published online 17 September 2009
A&A 507, 1675-1686 (2009)
DOI: 10.1051/0004-6361/200911755

INPOP08, a 4-D planetary ephemeris: from asteroid and time-scale computations to ESA Mars Express and Venus Express contributions

A. Fienga1, 2, J. Laskar1, T. Morley3, H. Manche1, P. Kuchynka1, C. Le Poncin-Lafitte4, F. Budnik3, M. Gastineau1, and L. Somenzi1, 2

1  Astronomie et Systèmes Dynamiques, IMCCE-CNRS UMR8028, 77 Av. Denfert-Rochereau, 75014 Paris, France
2  Observatoire de Besançon, CNRS UMR6213, 41bis Av. de l'Observatoire, 25000 Besançon, France
    e-mail: agnes@obs-besancon.fr
3  ESOC, Robert-Bosch-Str. 5, Darmstadt 64293, Germany
4  SYRTE, CNRS UMR8630, Observatoire de Paris, 77 Av. Denfert-Rochereau, 75014 Paris, France

Received 31 January 2009 / Accepted 24 August 2009

Abstract
The latest version of the planetary ephemerides developed at the Paris Observatory and at the Besançon Observatory is presented. INPOP08 is a 4-dimension ephemeris since it provides positions and velocities of planets and the relation between Terrestrial Time and Barycentric Dynamical Time. Investigations to improve the modeling of asteroids are described as well as the new sets of observations used for the fit of INPOP08. New observations provided by the European Space Agency deduced from the tracking of the Mars Express and Venus Express missions are presented as well as the normal point deduced from the Cassini mission. We show importance of these observations in the fit of INPOP08, especially in terms of Venus, Saturn and Earth-Moon barycenter orbits.


Key words: ephemerides -- astrometry -- time -- minor planets, asteroids -- solar system: general -- space vehicules



© ESO 2009