Gullies on the Dunes of Russell Crater
NASA/JPL/University of Arizona
Gullies on the Dunes of Russell Crater
PSP_010446_1255  Science Theme: Seasonal Processes
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This image represents part of the dune field present in the Northeast portion of Russell Crater. The dune field itself is roughly 30 kilometers long, and appears to have formed from windblown material trapped by the local topography.

This HiRISE image was taken during the Southern hemisphere's deep winter, where temperatures are low enough to allow the carbon dioxide frost to be stable. The frost is apparent primarily on the slopes that do not experience full sunlight, and is the target of a long term monitoring program by HiRISE.

Most of the gullies in this image appear to originate near the crests of their respective dunes, and are present on pole-facing slopes. The gullies in this image appear to have only two of the three components of normal gully morphology seen elsewhere on Mars, since they seem to lack a debris apron at their terminus. They have defined alcoves, and have unusually long channels that do not seem to change significantly in width.

Russell Crater is located in the Southern hemisphere at roughly 53.3 degrees South and 12.9 degrees East, and is approximately 140 kilometers in diameter.

Written by: Shawn D Hart   (7 January 2009)

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Acquisition date
18 October 2008

Local Mars time:
15:50

Latitude (centered)
-54.269°

Longitude (East)
12.950°

Range to target site
254.1 km (158.8 miles)

Original image scale range
50.8 cm/pixel (with 2 x 2 binning) so objects ~153 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
7.5°

Phase angle:
90.3°

Solar incidence angle
84°, with the Sun about 6° above the horizon

Solar longitude
143.7°, Northern Summer

North azimuth:
96°

Sub-solar azimuth:
40.3°
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All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible:
NASA/JPL/University of Arizona



Postscript
For information about NASA and agency programs on the Web, visit: http://www.nasa.gov. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA's Science Mission Directorate, Washington. Lockheed Martin Space Systems is the prime contractor for the project and built the spacecraft. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona. The image data were processed using the U.S. Geological Survey’s ISIS3 software.