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Shapes and gravitational moments of satellites and asteroids
Icarus, 1979Abstract The shapes and gravitational moments of tidally and rotationally distorted satellites with nonuniform internal density distributions are calculated. Spacecraft determinations of the radii and (a) the gravitational moments of some satellites of Jupiter and Saturn, particularly Io, Ganymede and Titan or (b) the shapes of some others ...
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Topography on satellite surfaces and the shape of asteroids
Icarus, 1973Consideration of the topography and shape of incompressible, nonrotating, isothermal, spherical objects as an approach to the study of the topography and shape of smaller planetary bodies. A static model and a creep deformation model are applied in the process.
T.V. Johnson, T.R. McGetchin
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Structural integrity of rubble asteroidal satellites
Icarus, 2019Abstract We investigate the structural integrity of asynchronous, rubble asteroidal satellites, which may or may not be in synchronous motion, by identifying necessary conditions for the structural equilibrium of such objects. Asynchronous motion may occur when the satellite’s rotation rate about its mass center does not match its orbital angular ...
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Asteroids' satellites in Gaia astrometric data
It is known to the astronomical community that asteroids with satellites are not uncommon in the Solar System. So far we have more than 500 documented asteroid systems encompassing binaries, pairs and multiples[1]. Yet, amidst this group of objects, several others remain enigmatic due to the challenges in observation and detection with conventional ...Luana Liberato, Paolo Tanga, David Mary
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The Formation of Asteroidal Satellites in Catastrophic Collisions
Icarus, 1996Abstract Numerical simulations of the initial stages of the expanding debris field resulting from the disruption of a parent asteroid show that the formation of co-orbiting fragments and even contact binaries is a natural outcome of catastrophic collisions between asteroids.
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1989
A substantial body of indirect evidence suggests that some asteroids have satellites, although none has been detected unambiguously. Collisions between asteroids provide physically plausible mechanisms for the production of binaries, but these operate with low probability; only a small minority of asteroids are likely to have satellites.
WEIDENSCHILLING S. J +2 more
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A substantial body of indirect evidence suggests that some asteroids have satellites, although none has been detected unambiguously. Collisions between asteroids provide physically plausible mechanisms for the production of binaries, but these operate with low probability; only a small minority of asteroids are likely to have satellites.
WEIDENSCHILLING S. J +2 more
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Fragmentation of asteroids and artificial satellites in orbit
Icarus, 1978Abstract In this paper we develop expressions for the probability density in the orbital elements resulting from a spherical explosion in orbit. The usual power law mass distribution is employed, and it is assumed that equipartition holds among velocity dispersions and masses. The asteroid families Themis, Eos, and Coronis (at least) show an envelope
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Prediction of stellar occultations by satellite of asteroids
2004Our group is working on the orbit determination of asteroid satellites on the last four years gathering data recorded with several AO systems. Based upon our observations, we focused specifically on models for (22) Kalliope, (121) Hermione, (45) Eugenia and (90) Antiope systems characterizing accurately their dynamical and physical properties (Marchis ...
Berthier, Jerôme +3 more
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Formation of satellites around large asteroids
Known satellites orbiting asteroids larger than ~100 km are found preferentially around primary bodies with rotation periods 5-6 h. This is significantly more rapid rotation than is typical for asteroids this large, which have an average rotation period closer to 10 hours.Kevin Walsh +5 more
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