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Determination of celestial body principal axes via gravity field estimation

Show simple item record Takahashi, Yu Bradley, Nicholas Kennedy, Brian 2019-05-29T19:33:27Z 2019-05-29T19:33:27Z 2016-09-12
dc.identifier.citation AIAA/AAS Astrodynamics Specialist Conference, Long Beach, California, September 12-15, 2016 en_US
dc.identifier.clearanceno 16-3707
dc.description.abstract The determination of physical parameters of celestial bodies provides critical navigational and scientific information. Determining the mass, rotation state, and density distribution is an important task of the navigation team on an operational mission. One representation of the internal density distribution, spherical harmonics, may be leveraged to compute the orientation of the principal axis frame of the celestial body, which in turn informs the dynamics of the body’s motion. Using data from NASA’s Dawn mission to the massive asteroids (1) Ceres and (4) Vesta, a method is proposed that refines the knowledge of the principal axis frame by utilizing estimated spherical harmonic coefficients. Applying an iterative rotation scheme to the solved-for body-fixed frame leads to convergence on a frame that is very close to the actual dynamical principal axis frame. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2016 en_US
dc.title Determination of celestial body principal axes via gravity field estimation en_US
dc.type Preprint en_US

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