Assertion: asteroid's mass | /r/HasProperty | obtained
Facets:
value: from perturbations of mars
type: LOCATION
Source sentences:
text: The masses of the largest asteroids 1 Ceres, 2 Pallas, and 4 Vesta can also be obtained from perturbations of Mars.  
text: The masses of the largest asteroids 1 Ceres, 2 Pallas, and 4 Vesta can also be obtained from perturbations of Mars.