Orbite circulaire impossible !
On peut relever ce passage dans le journal du 29 avril :
"...Observing Ceres from a very low altitude is possible only in an elliptical orbit, not a circular one. Dawn was not designed to operate at low altitude, and its reaction wheels, which are so important for controlling its orientation, have failed, making the problem even more difficult..."
Les photos prises à seulement 35 km de la surface promettent d'être spectaculaires !