Orbits of shepherd satellites deduced from the structure of the rings of Uranus
@article{Murray1990OrbitsOS, title={Orbits of shepherd satellites deduced from the structure of the rings of Uranus}, author={Carl D. Murray and Robert P. Thompson}, journal={Nature}, year={1990}, volume={348}, pages={499-502} }
The sharp edges of the rings of Uranus require the presence of small satellites to halt radial spreading. There are several key locations in the ring system where satellites would be most effective at confining rings. Some of these are close to resonances with the moon Cordelia, and there is indirect evidence for the existence of at least two of these satellites.
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References
SHOWING 1-10 OF 23 REFERENCES
Orbits of the ten small satellites of Uranus
- Physics, Geology
- 1987
Orbital elements are presented for the ten small satellites discovered by Voyager 2 at Uranus. These ten new satellites, whose provisional IAU designations are 1985UI and 1986UI through 1986U9, lie…
Creation of the Uranus rings and dust bands
- Physics, GeologyNature
- 1989
VOYAGER observations of the extended hydrogen exosphere of Uranus and of the σ Ring and its shepherds set an upper limit to the age of the σ Ring of 6 × 108 years. Unless we are seeing Uranus at a…
Shepherding of the Uranian rings. I. Kinematics
- Physics
- 1987
We identify several orbital resonances involving the newly discovered satellites, 1986U7 and 1986U8, and the Uranian rings. The most important resonances in eccentric rings are known as eccentric…
Shepherding of the Uranian Rings. II. Dynamics
- Physics
- 1987
We explore the dynamical significance of the orbital resonances, identified in Paper I (Porco and Goldreich 1987), involving the satellites 1986U7 and 1986U8, and the є, δ, and y rings. We…
Existence of moonlets in Saturn's rings inferred from the optical depth profile
- Physics, GeologyNature
- 1989
IT has been suggested1,2 that small satellites of diameter less than 50 km (moonlets) could exist within planetary rings, and could cause 'grooves' of low density in the adjacent ring material. Here…
Wavy edges suggest moonlet in Encke's gap
- Physics
- 1985
Voyager images have revealed radial undulations of the inner and outer edges of the 325 km wide Encke gap in Saturn's A ring. These waves are present at some, but not all, longitudes. Their locations…
The Dynamics of Planetary Rings
- Physics, Geology
- 1982
The discovery of ring systems around Uranus and Jupiter, and the Pioneer and
Voyager spacecraft observations of Saturn, have shown that planetary rings
are both more common and more complex than…