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The possibility of estimating tidal perturbations of Jupiter's Galilean satellites

Published online by Cambridge University Press:  04 August 2017

Jay H. Lieske
Jay H. Lieske*
Affiliation:
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109

Abstract

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Recent measurements in the infra-red of the energy emitted by Io suggest that if the observed emission is due to tidal dissipation in Io, then one should observe a very large secular acceleration of Io in its orbit. The purpose of this paper is to investigate the observational evidence which might be examined to verify that hypothesis. We have assembled the largest collection of eclipse observations extant and investigate the possibility of observing secular drifts in the period of Io. Analysis of eclipse observations requires the knowledge of good tables of ΔT and we explore the implications of the standard lunar acceleration of Spencer-Jones ṅMoon = −22.44 arcsec/cy2 versus that of Morrison and Ward ṅMoon = −26.0 arcsec/cy2. Preliminary results suggest that large tidal accelerations of Jupiter's satellites do not exist at the suggested magnitude and hence the heat flux measurements probably represent an episodic occurrence.

Type
Motions of Natural Bodies in the Solar System
Information
Symposium - International Astronomical Union , Volume 114: Relativity in Celestial Mechanics and Astrometry , 1986 , pp. 117 - 125
Copyright
Copyright © Reidel 1986 

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