HiRISE | Contortions on the Floor of Hellas Basin (ESP_016022

NASA/JPL/University of Arizona

Contortions on the Floor of Hellas Basin
ESP_016022_1420 Science Theme: Glacial/Periglacial Processes

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The floor of Hellas Basin is often obscured by atmospheric haze and dust, but it tends to be quite clear this time of year (northern spring and southern fall).

HiRISE images are revealing some very strange landforms on the floor of Hellas. Materials appear to have flowed in a viscous manner, like ice. Viscous flow features are common over the middle latitudes of Mars, but those in Hellas are often distinctive for unknown reasons.

The subimage shows an interesting area in color (reddish areas are dustier).

This image completes a stereo pair with PSP_007715_1420, so be sure to check out the stereo anaglyph.
Written by: Alfred McEwen (13 January 2010)

This is a stereo pair with PSP_007715_1420.

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Acquisition date:	26 December 2009	Local Mars time:	2:42 PM
Latitude (centered):	-37.5 degrees	Longitude (East):	57.6 degrees
Range to target site:	286.9 km (179.3 miles)	Original image scale range:	57.4 cm/pixel (with 2 x 2 binning) so objects ~172 cm across are resolved
Map projected scale:	50 cm/pixel and North is up	Map projection:	EQUIRECTANGULAR
Emission angle:	25.9 degrees	Phase angle:	80.7 degrees
Solar incidence angle:	62 degrees, with the Sun about 28 degrees above the horizon	Solar longitude:	29.3 degrees, Northern Spring
For non-map projected products:
North azimuth:	96 degrees	Sub-solar azimuth:	52.1 degrees
For map-projected products
North azimuth:	270 degrees	Sub solar azimuth:	223.2 degrees

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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.