The Dawn Gravity Investigation at Vesta and Ceres

被引：57

作者：

Konopliv, A. S. ^{[1
]}

Asmar, S. W. ^{[1
]}

Bills, B. G. ^{[1
]}

Mastrodemos, N. ^{[1
]}

Park, R. S. ^{[1
]}

Raymond, C. A. ^{[1
]}

Smith, D. E. ^{[2
]}

Zuber, M. T. ^{[3
]}

机构：

[1] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[2] NASA, Solar Syst Explorat Div, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[3] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA

来源：

SPACE SCIENCE REVIEWS | 2011年 / 163卷 / 1-4期

基金：

美国国家航空航天局;

关键词：

Dawn; Vesta; Ceres; Gravity; Geophysics; INTERNAL STRUCTURE; DOPPLER TRACKING; GLOBAL SOLUTION; KORONIS FAMILY; EARTH; ROTATION; INERTIA; DIFFERENTIATION; PRECESSION; ASTEROIDS;

D O I：

10.1007/s11214-011-9794-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：461 / 486

页数：26

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