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Optimal asteroid mass determination from planetary range observations ; a study of a simplified test model

Show simple item record Kuchynka, P. Laskar, J. Fienga, A. 2012-07-16T15:07:55Z 2012-07-16T15:07:55Z 2011-10-02
dc.identifier.citation EPSC-DPS Joint Meeting 2011, Nantes, France, October 2, 2011. en_US
dc.identifier.clearanceno 11-2411
dc.description.abstract Mars ranging observations are available over the past 10 years with an accuracy of a few meters. Such precise measurements of the Earth-Mars distance providevaluable constraints on the masses of the asteroids perturbing both planets. Today more than 30 asteroid masses have thus been estimated from planetary ranging data (see [1] and [2]). Obtaining unbiased mass estimations is nevertheless difficult. Various systematic errors can be introduced by imperfect reduction of spacecraft tracking observations to planetary ranging data. The large number of asteroids and the limited a priori knowledge of their masses is also an obstacle for parameter selection. Fitting in a model a mass of a negligible perturber, or on the contrary omitting a significant perturber, will induce important bias in determined asteroid masses. In this communication, we investigate a simplified version of the mass determination problem. Instead of planetary ranging observations from spacecraft or radar data, we consider synthetic ranging observations generated with the INPOP [2] ephemeris for a test model containing ~25000 asteroids. We then suggest a method for optimal parameter selection and estimation in this simplified framework. 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, 2011. en_US
dc.subject asteroids en_US
dc.subject mass ranging en_US
dc.title Optimal asteroid mass determination from planetary range observations ; a study of a simplified test model en_US
dc.type Preprint en_US
dc.subject.NASATaxonomy Astronomy en_US

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