EDP Sciences
Free access
Volume 410, Number 1, October IV 2003
Page(s) 337 - 341
Section The solar system
DOI http://dx.doi.org/10.1051/0004-6361:20030959

A&A 410, 337-341 (2003)
DOI: 10.1051/0004-6361:20030959

Astrometry from mutual events of Jovian satellites in 1997

R. Vasundhara1, J.-E. Arlot2, V. Lainey2 and W. Thuillot2

1  Indian Institute of Astrophysics, Bangalore, India
2  Institut de mécanique céleste et de calcul des éphémérides - Observatoire de Paris, UMR 8028 CNRS, 77 avenue Denfert-Rochereau, 75014 Paris, France

(Received 5 February 2003 / Accepted 16 April 2003 )

Astrometric results of observations of the mutual events of the Galilean satellites of Jupiter of the PHEMU97 campaign by the Institut de Mécanique Céleste et de Calcul des Éphémérides are presented. These astrometric positions can be directly utilized in the construction of future ephemerides. We attempt here to compare the residuals of the relative astrometric positions of satellites with respect to the E3, G5, E5 and L1 ephemerides. The model to fit the observed light curves includes the intensity variations on the surface of satellites using the mosaics constructed by the teams at the US Geological Survey from Voyager and Galileo imagery.

Key words: occultations -- eclipses -- planets and satellites: general -- astrometry -- ephemerides

Offprint request: J.-E. Arlot, Jean-Eudes.Arlot@imcce.fr

© ESO 2003