Determination of asteroids non gravitational perturbations

Details Determination of asteroids non gravitational perturbations Determination of asteroids non gravitational perturbations

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..932f&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.932

Mathematics

Probability

Scientific paper

We discuss a method to determine non gravitational parameters of asteroids. Non gravitational perturbations can lead to secular effects, thus changing the dynamical evolution. Moreover, the probability of an impact between the Earth and an asteroid can significantly change. To succeed in our purpose, we add non gravitational parameters to the set of unknowns in the procedure of least squares orbital fit. This technique allow us to compute both nominal values and covariance matrices for these parameters, provided the observational arc is long enough. As a test, we apply this approach to the case of 1999RQ36.

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