EDP Sciences
Free access
Volume 397, Number 1, January I 2003
Page(s) 353 - 359
Section The solar system
DOI http://dx.doi.org/10.1051/0004-6361:20021518

A&A 397, 353-359 (2003)
DOI: 10.1051/0004-6361:20021518

An upgraded theory for Helene , Telesto , and Calypso

P. Oberti1 and A. Vienne2

1  Observatoire de la Côte d'Azur, BP 4229, 06304 Nice Cedex 4, France
    e-mail: Pascal.Oberti@obs-nice.fr
2  Institut de mécanique céleste et de calcul des éphémérides, UMR 8028 du CNRS and Université de Lille, 1 impasse de l'Observatoire, 59000 Lille, France
    e-mail: Alain.Vienne@imcce.fr

(Received 1 August 2002 / Accepted 10 October 2002 )

A tridimensional model including the perturbation due to Saturn 's oblateness provides accurate solutions for the motions of Tethys and Dione 's Lagrangian satellites Telesto , Calypso , and Helene . Expanded around the Lagrangian points and compared to numerical simulations to check their reliabilities, the solutions are fitted to almost twenty years of data thanks to recently published observations. User-friendly compact series give Telesto , Calypso , and Helene 's positions and velocities in the mean ecliptic and equinox of J2000.

Key words: planets and satellites: individual: Saturn -- planets and satellites: general -- celestial mechanics

Offprint request: P. Oberti, pascal.oberti@obs-nice.fr

© ESO 2003