Intra-Crater Structure in NW Hellas Basin
NASA/JPL/University of Arizona
Intra-Crater Structure in NW Hellas Basin
ESP_017196_1455  Science Theme: Impact Processes
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This area of Hellas Basin has a number of unusual features which are thought to be quite old because of the high crater density. Here a crater has been filled with material. This may be related to volcanic activity on the northwestern rim of Hellas.

However, it might also be related to water and water ice. There is evidence elsewhere that the ground here is ice-rich. HiRISE will investigate this in more detail when Hellas Basin is free from atmospheric dust.

Written by: Nicolas Thomas   (5 May 2010)

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Acquisition date:28 March 2010 Local Mars time:15:18
Latitude (centered):-33.955° Longitude (East):48.502°
Range to target site:254.3 km (158.9 miles)Original image scale range:50.9 cm/pixel (with 2 x 2 binning) so objects ~153 cm across are resolved
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Emission angle:5.0° Phase angle:71.5°
Solar incidence angle:74°, with the Sun about 16° above the horizon Solar longitude:69.9°, Northern Spring

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