Dramatic Shadows over a Fossil Glacier
NASA/JPL/UArizona
Dramatic Shadows over a Fossil Glacier
ESP_044193_1430  Science Theme: Glacial/Periglacial Processes
This image was acquired near the Martian winter solstice, when the sun was low over the horizon at this location.

The resulting illumination produces dramatic accentuation of subtle topography. The image is centered on a fossil glacial flow, no longer active. On Earth, glaciers usually melt, but on frigid Mars they may be preserved for millions of years after ceasing activity. It formed on the south-facing slope of an impact crater in the southern middle latitudes.



Written by: Alfred McEwen (audio: Tre Gibbs)  (24 February 2016)
 
Acquisition date
31 December 2015

Local Mars time
15:11

Latitude (centered)
-36.635°

Longitude (East)
289.466°

Spacecraft altitude
248.7 km (154.6 miles)

Original image scale range
50.2 cm/pixel (with 2 x 2 binning) so objects ~151 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
7.2°

Phase angle
81.1°

Solar incidence angle
76°, with the Sun about 14° above the horizon

Solar longitude
88.6°, Northern Spring

For non-map projected images
North azimuth:  96°
Sub-solar azimuth:  52.5°
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non-map           (49MB)

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RGB color
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BONUS (MP4)
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NB
IRB: infrared-red-blue
RGB: red-green-blue
About color products (PDF)

Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

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.