Authors: Thomas P. C., Davies M. E., Colvin T. R., Oberst J., Schuster P., Neukum G., Carr M. H., MCEwen A., Schubert G., and Belton M. J. S.
Year: 1998
Title: The Shape of Io from Galileo Limb Measurements
Journal: Icarus
Volume: 135
Pages: 175-180
Keywords: Jupiter, galilean, planetology, spacecraft
Abstract: Galileo CCD images of the limb of Io provide improved data for determining the shape of this synchronously rotating satellite. The best ellipsoidal fit is within 0.3 km of the best equilibrium fit of 1829.7, 1819.2, 1815.8 km. The shape is consistent with substantial mass concentration in a core and with gravity measurements from tracking of the Galileo spacecraft. The surface of Io is largely plains and isolated peaks, with little long-wavelength topography over 1 km in amplitude.
%F: AA(Center for Radiophysics and Space Research, Cornell University, Ithaca, New York), AB(RAND, Santa Monica, California), AC(RAND, Santa Monica, California), AD(DLR, Institut fur Planetenerkundung, Berlin, Germany), AE(DLR, Institut fur Planetenerkundung, Berlin, Germany), AF(DLR, Institut fur Planetenerkundung, Berlin, Germany), AG(U.S. Geological Survey, Branch of Astrogeologic Studies, Menlo Park, California), AH(Lunar and Planetary Laboratory, University of Arizona, Tucson, Arizona), AI(Department of Earth and Space Sciences, University of California, Los Angeles, California), AJ(National Optical Astronomy Observatories, Tucson, Arizona)
Bibliogaphic Code: 1998Icar..135..175T
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