Dramatic Lighting of Icy Flows
NASA/JPL/University of Arizona
Dramatic Lighting of Icy Flows
ESP_025646_1440  Science Theme: Mass Wasting Processes
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This image shows flow features (tongue-shaped features in the depressions running down the slope) on the inner slope of an impact crater east of Hellas impact basin.

The time of year combined with MRO's orbit and the slope combine to provide the geometry for an image with almost glancing (very low sun) illumination. Such low-sun lighting enhances subtle topographic features and makes a dramatic image.

Other flows in this region of Mars, long thought to be due to flowing ice, have been confirmed to be icy by the Shallow Radar (SHARAD) experiment on MRO.

Written by: Alfred McEwen  (7 March 2012)
 
Acquisition date
15 January 2012

Local Mars time
15:06

Latitude (centered)
-35.452°

Longitude (East)
112.094°

Spacecraft altitude
252.2 km (156.7 miles)

Original image scale range
50.7 cm/pixel (with 2 x 2 binning) so objects ~152 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
4.8°

Phase angle
69.0°

Solar incidence angle
72°, with the Sun about 18° above the horizon

Solar longitude
57.5°, Northern Spring

For non-map projected images
North azimuth:  98°
Sub-solar azimuth:  51.1°
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Black & white is 5 km across; enhanced color about 1 km
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USAGE POLICY
All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible:
NASA/JPL/University of Arizona

POSTSCRIPT
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. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona.