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Rotation models for the Galilean satellites

Planetary and Space Science, 2022
Bruce G. Bills, Bryan R. Scott
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The Galilean Satellites

Science, 1999
NASA's Galileo mission to Jupiter and improved Earth-based observing capabilities have allowed major advances in our understanding of Jupiter's moons Io, Europa, Ganymede, and Callisto over the past few years. Particularly exciting findings include the evidence for internal liquid water oceans in Callisto and Europa, detection of a strong intrinsic ...
A P, Showman, R, Malhotra
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Galilean satellite obliquities

Journal of Geophysical Research: Planets, 2000
The obliquities, or angular separations between spin pole and orbit pole, for the Galilean satellites of Jupiter are all small but nonzero. We present calculations of the expected obliquity values based on the well known orbital parameters and recent estimates of the moments of inertia of the satellites, under the assumption that all are in Cassini ...
Bruce G. Bills, Richard D. Ray
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Galilean satellite mission concepts

Astrodynamics Conference, 1982
Post-Galileo mission concepts considered possible for satellite-intensive investigations are presented, with consideration given to single and multiple target scenarios using orbiter and lander deployments. Candidate missions that satisfy the selected science objectives are identified, and specific scenario/target combinations which fall within ...
J. SOLDNER, M. STANCATI, H. FEINGOLD
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Galilean satellites: 1976 radar results

Icarus, 1978
In addition to a report of radar observations concerning the Galilean satellites made in the fall of 1976, Doppler results are presented from 1975 and January 1976. The primary objectives of the investigation conducted in 1976 are related to a study of each satellite at widely separated orbital phases and a close examination of the polarization of its ...
Donald B. Campbell, John F. Chandler, Steven J. Ostro, Gordon H. Pettengill, Irwin I. Shapiro   +4 more
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A Critical Core Size for Dynamo Action at the Galilean Satellites

Geophysical Research Letters
Ganymede is the only known moon with an active dynamo. No mission has discovered intrinsic magnetism at the other Galilean satellites: Io, Europa, and Callisto. A dynamo requires a large magnetic Reynolds number, which in turn demands, for these moons, a
K. Trinh, C. Bierson, J. O'Rourke
semanticscholar   +1 more source

Touring the Galilean satellites

Astrodynamics Conference, 1970
Galilean satellites touring by Jupiter spacecraft, discussing orbit calculation and encounter ...
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Astrometric results of the mutual events between the Galilean satellites during 2014–15

Planetary and Space Science, 2019
Photometric observation of mutual events between planetary satellites can be used to obtain their high accurate astrometric data. The mutual events between the Galilean satellites occur every six years.
Chuanjun Wang, Xi-liang Zhang, Y. Xin, J. Bai   +3 more
semanticscholar   +1 more source

Rotation of Synchronous Satellites Application to the Galilean Satellites

Celestial Mechanics and Dynamical Astronomy, 2004
The equations of the \(n\)-body problem (and particularly, \( n=3 \) case) written in Keplerian variables have singularities in cases of orbits with small eccentricities and inclinations. On the contrary the Poincaré and the Laplace variables are regular for orbits with small eccentricities and inclinations, and are thus well suited for studying the ...
Henrard, Jacques, Schwanen, Gabriel
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Eclipse spectrophotometry of the Galilean satellites

Icarus, 1979
Narrowband spectrophotometry of satellite eclipses is presented for each of the Galilean satellites. Comparing the partially eclipsed full-phase satellite disk to the uneclipsed disk can reveal colorimetric inhomogeneities on the surface. The trailing half-disk of Ganymede is slightly blue compared to the leading half-disk.
Dale W. Smith, Paul E. Johnson
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