2 The dynamical model

We have recently developed a new numerical model of the five inner faint satellites of Jupiter, J5 Amalthea, J14 Thebe, J15 Adrastea, J16 Metis, and have used this to predict the phenomena. This model is founded on the Bulirsch et al. (1966) algorithm, including different effects such as the oblateness of the planet and the gravitational effects of the Galilean satellites. This model has been fitted to more than 87 positional observations for Amalthea spanning 1988 to 2000. The accuracy of the model has thus been estimated at 200 mas (i.e. 600 km at mean opposition). Compared to JPL ephemeris, our model has a standard deviation of 120 mas on the same period of time. Further information will be published later (Vachier, in preparation). The mutual events presented here involve J5 Amalthea and the first Galilean satellite Io. The model of motion of Io is issued from the Sampson-Lieske theory (1977) of the Galilean satellites, adjusted by Arlot and labeled G-5 (1982).