Ephémérides des satellites faibles de Jupiter et de Saturne pour 1990

Abstract : In the following tables are given the ephemerides of the satellites J VI, J VII, J VIII and J IX of Jupiter, and of the satellite Phoebe (S IX) of Saturn. These ephemerides come from numerical integration of the G.B.S. type (Gragg-Bulirsch-Stoer, 1966).The numerical constants of integration are those used by T.V. Bordovystina and L.E. Bykova (1978) for J VI and J VII, by K.A. Aksnes (1973) for J VIII and J IX and by L.E. Rose (1979) for Phoebe. For these satellites, these constants are adjusted by comparison with the observations. The published quantities are equatorial, geocentric and astrometric coordinates. For each year, we find successively the ephemerides for J VI, J VII, J VIII ,J IX, Jupiter and Phoebe developed into Chebyshev series. Each development covers 33 days beginning by the day before the first day in the month, numbered zero. The developments contain 10 coefficients, numbered from zero to nine, the value above the table of coefficients corresponds to the starting date in the given interval of time. The right ascension is expressed in hour, the declination in degree and the distance in A.U. The argument of the series is the ephemeris time (T.E) expressed in Julian days. The planetary ephemerides have been computed from DEl02 (J.P.L. ephemerides).The published coefficients are such that precision of 0.01 second of time in right ascension, 0.1 second of degree in declination and 1.10-6 au in distance, is obtained. This supplement will be published every year, with eventually new satellites.
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A. Bec-Borsenberger, P. Rocher. Ephémérides des satellites faibles de Jupiter et de Saturne pour 1990. [Rapport de recherche] Institut de mécanique céleste et de calcul des éphémérides (IMCCE). 1989, 24 p., tableaux. ⟨hal-01464918⟩

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