Lobate Flow Features in the Northwest Hellas Rim
NASA/JPL/University of Arizona

Lobate Flow Features in the Northwest Hellas Rim
ESP_024000_1425  Science Theme: Glacial/Periglacial Processes
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This image, taken by HiRISE, shows a lobate tongue on the Northwest Hellas rim.

Lobate features such as these are located in the mid-latitudes (30-60 degrees), indicative of viscous flow, are reminiscent of terrestrial glaciers and have long-been interpreted as evidence for subsurface ice.

Recent ground penetrating radar observations by SHARAD of other lobate features in this latitude belt also support the notion that these features have cores with ice.

Written by: Eldar Noe   (19 October 2011)

This is a stereo pair with ESP_023710_1425.



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Acquisition date:09 September 2011 Local Mars time: 2:12 PM
Latitude (centered):-37.051° Longitude (East):46.414°
Range to target site:287.0 km (179.4 miles)Original image scale range:28.7 cm/pixel (with 1 x 1 binning) so objects ~86 cm across are resolved
Map projected scale:25 cm/pixel and North is upMap projection:Equirectangular
Emission angle:28.4° Phase angle:69.2°
Solar incidence angle:47°, with the Sun about 43° above the horizon Solar longitude:358.0°, Northern Winter
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North azimuth:90° Sub-solar azimuth:48.1°
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North azimuth:270°Sub solar azimuth:221.2°

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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.