EDP Sciences
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Volume 427, Number 1, November III 2004
Page(s) 371 - 376
Section Celestial mechanics and astrometry
DOI http://dx.doi.org/10.1051/0004-6361:20041271

A&A 427, 371-376 (2004)
DOI: 10.1051/0004-6361:20041271

New accurate ephemerides for the Galilean satellites of Jupiter

II. Fitting the observations
V. Lainey1, 2, J. E. Arlot2 and A. Vienne2, 3

1  Royal Observatory of Belgium, Ringlaan 3, 1180 Brussels, Belgium
    e-mail: Lainey@oma.be
2  Institut de mécanique céleste et de calcul des éphémérides - Observatoire de Paris, UMR 8028 du CNRS, 77 avenue Denfert-Rochereau, 75014 Paris, France
3  Université Lille 1, IMCCE/LAL, 1 impasse de l'Observatoire, 59000 Lille, France

(Received 11 May 2004 / Accepted 5 July 2004)

We present a new model of the four Galilean satellites Io, Europa, Ganymede and Callisto, able to deliver accurate ephemerides over a very long time span (several centuries). In the first paper (Lainey et al. 2004, A&A, 420, 1171) we gave the equations of the dynamical model. Here we present the fit of this model to the observations, covering more than one century starting from 1891. Our ephemerides, based on this first fit called L1, are available on the web page of the IMCCE at the URL http://www.imcce.fr/ephemeride_eng.html.

Key words: astrometry -- planets and satellites: individual: Io -- planets and satellites: individual: Europa -- planets and satellites individual: Ganymede -- planets and satellites: individual: Callisto -- ephemerides

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