Orbital Evolution of New Distant Neptunian Satellites and omega-Librators in the Satellite Systems of Saturn and Jupiter

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

We used data on the recently discovered three outer Neptunian satellites to analyze the long-period evolution of their orbits. We estimated the ranges of eccentricities and inclinations as well as approximate circulation periods of the pericenter arguments and the longitudes of the ascending nodes. The results were mainly obtained by using two different versions of the averaged Hill problem. Plane sections of the phase space of satellite orbital elements are given. We discuss the peculiarity of the evolution of several satellite orbits related to the librational variation of the pericenter argument omega. The omega-librators of Saturn's system were found to qualitatively differ from the libration orbit in the system of Jupiter.

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