Stellar occultations for asteroid astrometry Motivations The high quality astrometry of Gaia offers unique opportunities for solar system science. Apart from t...
Occultation astrometry major goals The power of Gaia based predictions was demonstrated by the successful observation of a MU69/Arrokoth occultation (New Horizo...
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The poorly known L type asteroids and the intriguing Barbarians We investigate the poorly known L type asteroids as some of them (known as "Barbarians") are known...
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Observational opportunities until the end of year 2016 for all asteroids with accurate mass estimates (compiled from the literature), and for which shape models h...
Stellar occultations, preparing the Gaia era The technique of observation relies upon fast photometry and accurate absolute timing of the observations (by appropr...
Thermal modeling The most frequent method to determine the size (and volume) of an asteroid is fitting the thermal data observations (typically from IRAS, WISE, a...
Shape determination Orbital parameters are currently known for more than 500 000 asteroids. On the other hand, rotational states and shapes were determined only f...
Photometry One of the most important sources of information about asteroid physical parameters is photometry typical kilometer sized asteroids (up to diameters ...
Densities of asteroids: convex shape models and Gaia masses This project focus on the volume determination by scaling the convex shape models in size. To determin...
Densities of asteroids: convex shape models and Gaia masses This project focus on the volume determination by scaling the convex shape models in size. To determin...
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Why a coronograph? We plan to image Venus when it is close to the solar limb, around the transit event occuring on June 5 6, 2012, when twilight phenomena become ...
Test results Solar observation on 27/12/2011 : The three images below are the result of the addition of 20 images taken in a 2 second stream. Light wavelet proce...
Sample pictures from Lowell Observatory (P. Tanga, W. Sheehan, K. Brausch, W. Burke, J. Roberts) Very good transparency, but bad seeing and wind disturbing the ob...
Coronagraph placement Venus TEx Coronographs map here The following table indicates the sites, the observer(s) and the associated filters for each of them: 1 ...