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Topographic modeling of Phoebe using Cassini images

Giese, Bernd and Neukum, Gerhard and Roatsch, Thomas and Denk, Tilmann and Porco, Carolyn (2006) Topographic modeling of Phoebe using Cassini images. Planetary and Space Science, 54 (12), pp. 1156-1166. Elsevier. DOI: doi:10.1016/j.pss.2006.05.027

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Abstract

High-resolution Cassini stereo images of Saturn's moon Phoebe have been used to derive a regional Digital Terrain Model (DTM) and an orthoimage mosaic of the surface. For DTM-control, a network of 130 points measured in 14 images (70-390 m/pixel resolution) was established which was simultaneously used to determine the orientation of the spin-axis. The J2000 spin-axis was found at RA = 78.0°±0.1° and Dec = 356.6°±0.3°, substantially different from the former Voyager solution. The control points yield a mean figure radius of 107.2 km with RMS residuals of 6.2 km demonstrating the irregular shape of this body. The DTM obtained is based on methods of digital image correlation. It has a horizontal resolution of 1-2 km and vertical accuracies in the range of 50-100 m. Although limited in coverage, it is higher in resolution than the previously derived global shape model of Phoebe (Porco et al., 2005) and allows us to study the morphology of the surface in more detail. The most important feature revealed by the DTM is the conical shape of craters which has not been reported on planetary bodies so far. The formation of such craters may hint at highly porous material on the surface of Phoebe.

Item URL in elib:https://elib.dlr.de/19228/
Document Type:Article
Title:Topographic modeling of Phoebe using Cassini images
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Giese, BerndUNSPECIFIEDUNSPECIFIED
Neukum, GerhardInstitut für Geologische Wissenschaften, Freie Universität, BerlinUNSPECIFIED
Roatsch, ThomasUNSPECIFIEDUNSPECIFIED
Denk, TilmannInstitut für Geologische Wissenschaften, Freie Universität, BerlinUNSPECIFIED
Porco, CarolynCICLOPS, Space Science Institute, Boulder, CO, USAUNSPECIFIED
Date:2006
Journal or Publication Title:Planetary and Space Science
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:54
DOI :doi:10.1016/j.pss.2006.05.027
Page Range:pp. 1156-1166
Publisher:Elsevier
Status:Published
Keywords:Phoebe, Cassini, topographic mapping, digital terrain model, craters
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben CASSINI (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Institute of Planetary Research > Planetary Geology
Deposited By: Giese, Dr.rer.nat. Bernd
Deposited On:26 Jan 2009
Last Modified:07 Aug 2017 10:49

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