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Cassini Imaging Science: Initial Results on Phoebe and Iapetus

Porco, C. C. and Dyudina, U. and Ingersoll, A. P. (2005) Cassini Imaging Science: Initial Results on Phoebe and Iapetus. Science, 307 (5713). pp. 1237-1242. ISSN 0036-8075. doi:10.1126/science.1107981.

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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 December 2004. Phoebe has a heavily cratered and ancient surface, shows evidence of ice near the surface, has distinct layering of different materials, and has a mean density that is indicative of an ice-rock mixture. Iapetus's dark leading side (Cassini Regio) is ancient, heavily cratered terrain bisected by an equatorial ridge system that reaches 20 kilometers relief. Local albedo variations within and bordering Cassini Regio suggest mass wasting of ballistically deposited material, the origin of which remains unknown.

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Ingersoll, A. P.0000-0002-2035-9198
Additional Information:© 2005 American Association for the Advancement of Science. 29 November 2004; accepted 12 January 2005. We acknowledge the individuals at CICLOPS and across the Imaging Team who helped in planning and designing the Phoebe and Iapetus sequences and in keeping the imaging operations running smoothly. This paper is dedicated to the memory of Damon Simonelli, who developed much of the pre-Cassini understanding of Phoebe’s surface. This work has been funded by NASA/Jet Propulsion Laboratory, the UK Particle Physics and Astronomy Research Council, the German Aerospace Center (DLR), and Université Paris VII Denis Diderot, Commissariat à l’Energie Atomique, Astrophysique Interactions Multiechelles, France.
Funding AgencyGrant Number
Particle Physics and Astronomy Research Council (PPARC)UNSPECIFIED
Deutschen Zentrums für Luft- und Raumfahrt (DLR)UNSPECIFIED
Commissariat à l’Energie Atomique (CEA)UNSPECIFIED
Issue or Number:5713
Record Number:CaltechAUTHORS:20130128-154223745
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36635
Deposited By: Jason Perez
Deposited On:29 Jan 2013 21:58
Last Modified:09 Nov 2021 23:23

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