TANGA , P.

International audience

By definition, an alert system has to be activated as fast as possible in response to a selected event. For this reason, a pipeline performing fast processing of Gaia observations of Solar System objects (SSO) is being implemented. Its output will concern moving objects that are not matched against an up-to-date catalogue of known asteroids....

Context: Observation of star occultations is a powerful tool to determine shapes and sizes of asteroids. This is key information necessary for studying the evolution of the asteroid belt and to calibrate indirect methods of size determination, such as the models used to analyze thermal infrared observations. Up to now, the observation of...

International audience

Context. Occultations of stars by asteroids are an efficient method to study the properties of minor bodies, and can be exploited as tools to derive very precise asteroid astrometry relative to the target star. With the availability of stellar astrometry thanks to the ESA mission Gaia, the frequency of good predictions and the quality of the...

According to current plans of ESA, Gaia will be launched in 2011. With a systematic survey of the whole sky down to magnitude V = 20, Gaia will provide a fundamental contribution in practically all fields of modern Astrophysics. In particular, Gaia will be also a major milestone in the history of asteroid science. Based on its unprecedented...

Planetary and Space Science, 56, pp. 1823-1827, http://dx.doi.org./10.1016/j.pss..02.029

International audience

International audience

Context. The technique of stellar occultations, greatly enhanced by the publication of the Gaia data releases, permits not only the determination of asteroid size and shape, but also the retrieval of additional, very accurate astrometry, with a possible relevant impact on the study of dynamical properties. The use of Gaia as reference catalogue...

Context. Sparse photometric data can be used to determine the spin properties and infer information about the shapes of asteroids. The algorithm adopted for the inversion of Gaia photometric data assumes, for the sake of simplicity and to minimize CPU execution time, that the objects have triaxial ellipsoid shapes. In the past, this algorithm...

International audience

Planetary and Space Science, 57, pp. 193-200, http://dx.doi.org./10.1016/j.pss.2008.06.016

Advances in Space Research, 40, pp. 202-208, http://dx.doi.org./10.1016/j.asr..03.011

International audience

International audience

International audience

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International audience

International audience

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