We will present preliminary results of the occultation of Tycho star 6833-00163-1 by the dwarf-planet 1 Ceres. The 11.8 visual magnitude star was occulted in the night of 17 August 2010, with the shadow passing through south, south-east and central part of Brazil. The observation was a challenge because of the drop in magnitude was only 0.07 for a visual magnitude of 8.4 foreseen for Ceres at the time of the occultation. We obtained data from five sites, with successful detections of the event from four of them. Occultation chords span from the extreme north portion of the asteroid to the south of it. As this is a recent event, analysis is still in progress. Preliminary results will be presented on Ceres' radius, and possibly, on its oblateness.