Determination of Ceres mass based on the most gravitationally efficient close encounters

Details Determination of Ceres mass based on the most gravitationally efficient close encounters Determination of Ceres mass based on the most gravitationally efficient close encounters

2011-09-29

arxiv.org/abs/1109.6455v2

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

MNRAS:Accepted 2011 September 28. Received 2011 September 28; in original form 2011 January 21

Scientific paper

Here is presented recalculated value of the mass of Ceres, based on explicit tracking of its gravitational influence on orbits evolution of 21 selected asteroids during their mutual close encounters (CE). It was applied a new modified method (MM) for mass determination, based on the connecting of pre-encounter observations to the orbit determined from post-encounter ones. The calculated weighted mean value of Ceres mass, based on modified method, is $(4.54\pm0.07)\,10^{-10}M_{\odot}$ while standard procedure (SM) provided result of $(4.70\pm0.04)\,10^{-10}M_{\odot}$. We found that correlation between individual estimated masses based on modified and standard method is 0.78, which confirms reliability of using modified method.

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