Avire Crater Seasonal Monitoring
NASA/JPL/University of Arizona
Avire Crater Seasonal Monitoring
ESP_023322_1390  Science Theme: Seasonal Processes
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This crater shows prominent gullies on it walls. The origin of gullies is controversial, but many, and probably those here, seem to require carbon dioxide or water frost that may fluidize debris flows,or possibly water in an ephemeral (short term) stability state that erodes the surface.

This region is being continually monitored by HiRISE to note any changes.

Written by: HiRISE Science Team   (21 September 2011)

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Acquisition date:18 July 2011 Local Mars time:14:15
Latitude (centered):-40.830° Longitude (East):200.259°
Range to target site:254.5 km (159.1 miles)Original image scale range:50.9 cm/pixel (with 2 x 2 binning) so objects ~153 cm across are resolved
Map projected scale:50 cm/pixel and North is upMap projection:Equirectangular
Emission angle:0.5° Phase angle:41.8°
Solar incidence angle:41°, with the Sun about 49° above the horizon Solar longitude:330.2°, Northern Winter

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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.