Dynamical and observational constraints on satellites in the inner Pluto-Charon system

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Charon, Dynamic Models, Eccentric Orbits, Image Analysis, Natural Satellites, Pluto (Planet), Satellite Orbits, Three Body Problem, Astronomical Photography, Center Of Mass, Constraints, Hubble Space Telescope, Simulation

Scientific paper

It is not known if Pluto has other satellites besides its massive partner Charon. In the past, searches for additional satellites in the Pluto-Charon system have extended from the solar-tidal stability boundary (approximately 90 arcsec from Pluto) inward to about 1 arcsec from Pluto. Here we further explore the inner (i.e., less than 10 arcsec) region of the Pluto-Charon system to determine where additional satellites might lie. In particular, we report on (1) dynamical simulations to delineate the region where unstable orbits lie around Charon, (2) dynamical simulations which use the low orbital eccentricity of Charon to constrain the mass of any third body near Pluto, and (3) analysis of Hubble Space Telescope (HST) archival images to search for satellites in the inner Pluto-Charon system. Although no objects were found, significant new constraints on bodies orbiting in the inner Pluto-Charon system were obtained.

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