Crater Dunes Revisited
NASA/JPL/University of Arizona
Crater Dunes Revisited
PSP_010854_1325  Science Theme: Seasonal Processes


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In the winter, these dunes in an unnamed crater east of Proctor Crater are covered with seasonal carbon dioxide frost (dry ice). In the spring, the frost gradually evaporates but lingers in protected regions. In this color image bright ice deposits in sheltered areas highlight the ripples on the dunes.

These dunes were imaged during the first year of MRO's mission. Images taken now in the second Martian spring can be compared to the previous year to study interannual variability.

Written by: Candy Hansen   (18 February 2009)

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Acquisition date:19 November 2008 Local Mars time:15:59
Latitude (centered):-47.184° Longitude (East):34.001°
Range to target site:254.5 km (159.0 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:8.2° Phase angle:70.3°
Solar incidence angle:77°, with the Sun about 13° above the horizon Solar longitude:160.1°, Northern Summer

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