Determination of Masses in Pluto's System from Astrometry

Details Determination of Masses in Pluto's System from Astrometry Determination of Masses in Pluto's System from Astrometry

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.4704b&link_type=abstract

American Astronomical Society, DPS meeting #41, #47.04

Astronomy and Astrophysics

Astronomy

Scientific paper

Thanks to the recent discovery of Nix and Hydra, the total mass of the sub-system Pluto/Charon has been determined precisely. Yet the masses of each object remain poorly constrained, especially those of Nix and Hydra. Previous dynamical models have not constrained precisely their masses due to Nix's and Hydra's low influence on Charon's motion and the characteristics of the said models. The compacity of Pluto's system has lead us to consider the effects of oblate gravity fields on the satellites' motion. What remains to be done is to adjust our model to observations of the system in order to obtain more constrained masses for the objects, and the oblate gravity parameters.

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