Ice in a Chlorite-Bearing Escarpment in Northwest Hellas
NASA/JPL/University of Arizona
Ice in a Chlorite-Bearing Escarpment in Northwest Hellas
ESP_027758_1530  Science Theme: 
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A south-facing escarpment in the Northwest Hellas region that was targeted for the phyllosilicates shows instances of bluish rock in this enhanced color image.

CRISM spectra of the bluish material shows that it consists of a combination of chlorite and water ice. The image was captured at the beginning of southern spring, at a time period when south-facing escarpments still retain ices deposited during the winter.

Written by: Eldar Noe   (22 May 2013)

This is a stereo pair with ESP_027270_1530.

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Acquisition date
28 June 2012

Local Mars time:
15:36

Latitude (centered)
-26.501°

Longitude (East)
55.094°

Range to target site
268.2 km (167.6 miles)

Original image scale range
26.8 cm/pixel (with 1 x 1 binning) so objects ~80 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
18.0°

Phase angle:
56.7°

Solar incidence angle
69°, with the Sun about 21° above the horizon

Solar longitude
131.4°, Northern Summer

North azimuth:
97°

Sub-solar azimuth:
42.2°
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Black & white is 5 km across; enhanced color about 1 km
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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
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.