Iapetus: Unique Surface Properties and a Global Color Dichotomy from Cassini Imaging

  title={Iapetus: Unique Surface Properties and a Global Color Dichotomy from Cassini Imaging},
  author={Tilmann Denk and Gerhard Neukum and Thomas Roatsch and Carolyn C. Porco and Joseph A. Burns and G. G. Galuba and Nico Schmedemann and P. Helfenstein and Peter C. Thomas and Roland J. Wagner and Robert A. West},
  pages={435 - 439}
Iapetus Revealed The striking appearance of Saturn's moon Iapetus—half black and half white—has puzzled astronomers for over three centuries. Now Spencer and Denk (p. 432, published online 10 December) present an explanation for this asymmetry: A thermally controlled runaway migration of water ice triggered by exogenic deposition of dark material on the moon's leading darker side, which faces the direction of motion of the moon in its orbit around Saturn. This mechanism is unique to Iapetus… 

Cassini-Huygens’ exploration of the Saturn system: 13 years of discovery

The Cassini-Huygens mission to Saturn provided a close-up study of the gas giant planet, as well as its rings, moons, and magnetosphere, and results show that Saturn's rings are substantially younger than the planet itself and constrain models of their origin.

Delayed formation of the equatorial ridge on Iapetus from a subsatellite created in a giant impact

[1] The great equatorial ridge on Saturn's moon Iapetus is arguably the most perplexing landform in the solar system. The ridge is a mountain range up to 20 km tall and sitting on the equator of

Icy Satellites: Geological Evolution and Surface Processes

The sizes of the Saturnian icy satellites range from ~ 1;500 km in diameter (Rhea) to ~20km (Calypso), and even smaller ‘rocks’ of only a kilometer in diameter are common in the system. All these




Abstract The albedo asymmetry of Iapetus is unique in the Solar System. Many models have been proposed to explain why the leading hemisphere has a reflectance 10–20 times lower than the trailing

Cassini Imaging Science: Initial Results on Phoebe and Iapetus

The Cassini Imaging Science Subsystem acquired high-resolution imaging data on the outer Saturnian moon, Phoebe, during Cassini's close flyby on 11 June 2004 and on Iapetus during a flyby on 31

Emission Source Model of Jupiter's H+3Aurorae: A Generalized Inverse Analysis of Images

Abstract We mapped the distribution of H + 3 emissions in Jupiter's polar regions utilizing 3.4-μm images acquired with ProtoCAM at the NASA IRTF. Two data sets, one acquired on February 28 and the

High-Resolution 0.33–0.92 μm Spectra of Iapetus, Hyperion, Phoebe, Rhea, Dione, and D-Type Asteroids: How Are They Related?

New high-resolution spectra in the 0.33 to 0.92 μm range of Iapetus, Hyperion, Phoebe, Dione, Rhea, and three D-type asteroids were obtained on the Palomar 200-inch telescope and the double