The Dawn Gravity Investigation at Vesta and Ceres

Details The Dawn Gravity Investigation at Vesta and Ceres The Dawn Gravity Investigation at Vesta and Ceres

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ssrv..163..461k&link_type=abstract

Space Science Reviews, Volume 163, Issue 1-4, pp. 461-486

Physics

Geophysics

5

Dawn, Vesta, Ceres, Gravity, Geophysics

Scientific paper

The objective of the Dawn gravity investigation is to use high precision X-band Doppler tracking and landmark tracking from optical images to measure the gravity fields of Vesta and Ceres to a half-wavelength surface resolution better than 90-km and 300-km, respectively. Depending on the Doppler tracking assumptions, the gravity field will be determined to somewhere between harmonic degrees 15 and 25 for Vesta and about degree 10 for Ceres. The gravity fields together with shape models determined from Dawn’s framing camera constrain models of the interior from the core to the crust. The gravity field is determined jointly with the spin pole location. The second degree harmonics together with assumptions on obliquity or hydrostatic equilibrium may determine the moments of inertia.

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