Ceres have a mass of 9 @.@ 39 × 1020 kg as determined from the Dawn spacecraft . With this mass Ceres comprise approximately a third of the estimated total 3 @.@ 0 ± 0 @.@ 2 × 1021 kg mass of the asteroid belt , which is in turn approximately 4 % of the mass of the Moon . Ceres is massive enough to give it a nearly spherical , equilibrium shape . Among Solar System bodies , Ceres is intermediate in size between the smaller Vesta and the larger Tethys . Its surface area is approximately the same as the land area of India or Argentina .