100-metre-diameter moonlets in Saturn's A ring from observations of 'propeller' structures

@article{Tiscareno2006100metrediameterMI,
  title={100-metre-diameter moonlets in Saturn's A ring from observations of 'propeller' structures},
  author={Matthew S. Tiscareno and Joseph A. Burns and Matthew M. Hedman and Carolyn C. Porco and John Wilfred Weiss and Luke Dones and Derek C. Richardson and Carl D. Murray},
  journal={Nature},
  year={2006},
  volume={440},
  pages={648-650}
}
Saturn's main rings are composed predominantly of water-ice particles ranging between about 1 centimetre and 10 metres in radius. Above this size range, the number of particles drops sharply, according to the interpretation of spacecraft and stellar occultations. Other than the gap moons Pan and Daphnis (the provisional name of S/2005 S1), which have sizes of several kilometres, no individual bodies in the rings have been directly observed, and the population of ring particles larger than ten… 

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References

SHOWING 1-10 OF 32 REFERENCES

Structures induced by small moonlets in Saturn's rings: Implications for the Cassini Mission

Particle simulations are carried out to study density features caused by small moonlets embedded in a dense planetary ring. The creation of a “propeller” like structure is found together with

Density patterns induced by small moonlets in Saturn's rings?

An extension of the model of the gravitational scattering by moonlets in planetary rings to collisional diffusion is presented. The resulting typical propeller-shaped structures bear the chance to

Voyager Photometry of Saturn's A Ring

Abstract Saturn's A Ring samples a wide range of dynamical environments, from the relatively unperturbed, optically thick inner region to the outer part of the ring, which contains numerous density

Planetary Rings

Planetary rings are those strikingly flat and circular appendages embracing all the giant planets in the outer Solar System: Jupiter, Saturn, Uranus, and Neptune. Like their cousins, the spiral