EDP Sciences
Free access
Volume 400, Number 3, March IV 2003
Page(s) 1095 - 1101
Section The Sun
DOI http://dx.doi.org/10.1051/0004-6361:20030013

A&A 400, 1095-1101 (2003)
DOI: 10.1051/0004-6361:20030013

CCD astrometric observations of Saturnian satellites

C. H. Veiga1, R. Vieira Martins1, A. Vienne2, 3, W. Thuillot3 and J.-E. Arlot3

1  Observatório Nacional, Rua Gal. José Cristino 77, 20921-400 Rio de Janeiro, Brazil
2  Université de Lille, 59000 Lille, France
3  Institut de Mécanique Céleste et de Calculs des Éphémérides, 77 avenue Denfert-Rochereau 75014 Paris, France

(Received 18 October 2002 / Accepted 14 November 2002)

Astrometric positions of the first eight largest Saturnian satellites and the Lagrangian satellites Helene, Telesto and Calypso are presented from 493 CCD frames taken at the oppositions in 1995 through 1999. The images were obtained over 27 nights. Observed positions are compared with the calculated ones from Vienne and Duriez TASS 1.7 for the large satellites and from JPL positions for the Lagrangian satellites. The rms is about 0 $\farcs$12 for the former but 0 $\farcs$20 for Iapetus and 0 $\farcs$28 for Hyperion. For the Lagrangian satellites it is about 0 $\farcs$21 for Helene, 2 $\farcs$02 for Telesto and 0 $\farcs$60 for Calypso.

Key words: planets and satellites: individual: Saturn -- astrometry

Offprint request: C. H. Veiga, cave@on.br

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