The Orbits of the Satellites of Pluto

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

We report on the latest ephemerides (plu020) for the satellites of Pluto. The model for the satellites' orbits is numerical integration. External perturbations due to the Sun (augmented with the inner solar system planets), Jupiter, Saturn, Uranus, and Neptune are included. The data set consists of astrometric measurements and lightcurves from the mutual events and occultations. Our goal was not only to better constrain the satellites' orbits, but also to improve upon Pluto's orbit, as well as to provide the latest estimates for the GMs for the entire Pluto system. Our results are summarized in terms of the state vectors in the ICRF Cartesian states relative to the barycenter of the Pluto system. We also provide orbital elements that are obtained by fitting the precessing ellipses to the barycentric positions from the integration over the 10 year time period.

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