Denk, T. and Jaumann, R. and Neukum, G. (1994) A new search for surface features on the dark leading side of Iapetus. In: Bulletin of the American Astronomical Society, 3, 1163-. 26th Annual Meeting of the American Astronomical Society, Division for Planetary Science (DPS), Washington, DC, Oct 31 - Nov. 4, 1994.
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The most unusual property of the Saturnian satellite Iapetus is the extreme difference in brightness between the leading and trailing/ polar hemispheres (albedo 0.05 and 0.5,respectively). While individual Voyager images of the bright side show many features like craters or scarps, the dark Cassini regio area appears featureless. The main reason for this lack is the low signal-to-noise ratio of the raw-image data. Depending on the used filter and exposure time, the dark side is (on average) onyl about 2-3 % brighter than the dark sky. Another problem is the low resolution of the Cassini regio frames (23 km/pixel or worse). The S/N ratio can be improved using subpixel registration and the summation of different frames from one image sequence. This allows the S/N ratio to be improved bya factor of greater than three. Preliminary results indicate the features appears within Cassini regio at a higher signal level. One example is a circular structure with a diameter of about 400 km in the northern part of the center of the leading side. A description of these features is presented.
|Document Type:||Conference or Workshop Item (Speech)|
|Additional Information:||LIDO-Berichtsjahr=1994, pages=1,|
|Title:||A new search for surface features on the dark leading side of Iapetus|
|Journal or Publication Title:||Bulletin of the American Astronomical Society|
|Keywords:||Iapetus; Japetus; Cassini regio, surface; features; leading side|
|Event Title:||26th Annual Meeting of the American Astronomical Society, Division for Planetary Science (DPS), Washington, DC, Oct 31 - Nov. 4, 1994|
|HGF - Research field:||UNSPECIFIED|
|HGF - Program:||other|
|HGF - Program Themes:||other|
|DLR - Research area:||UNSPECIFIED|
|DLR - Program:||no assignment|
|DLR - Research theme (Project):||UNSPECIFIED|
|Institutes and Institutions:||Institute of Planetary Research > Institut für Planetenerkundung|
|Deposited By:||elib DLR-Beauftragter|
|Deposited On:||02 Apr 2006|
|Last Modified:||27 Apr 2009 09:47|
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