Astrometric results of the PHESAT95 campaign

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    The PHESAT95 campaign organized by the IMCCE resulted in 65 lightcurves of mutual events involving the 6 major Saturnian satellites, observed all around the world. We performed an astrometric reduction of these 65 lightcurves in order to get very accurate positions. We modelled the light of the satellites involved in every event, taking account of the anisotropy of the light diffusion by the surface of atmosphereless bodies. We used photometric parameters known thanks to spacecrafts. Some lightcurves are more or less noisy than some others ones, that is the reason why we splitted the results into 3 parts: the "best", the "average", and the others. There are 16 "best" positions, with a mean accuracy of 25-30 mas. Moreover, we pointed out the improvements given by considering the surface effects, and an ambiguity between 2 possible positions when the distance between 2 satellites is too low.
    langue originaleAnglais
    titreMutual events of the Uranian satellites and observations in network
    rédacteurs en chefJ. E Arlot, W Thuillot
    Lieu de publicationParis, France
    EditeurJE Arlot & W. Thuillot
    Etat de la publicationNon publié - 2006

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