Cliffs in Ancient Ice
NASA/JPL/UArizona
Cliffs in Ancient Ice
ESP_065881_1225  Science Theme: Mass Wasting Processes
Scientists have come to realize that, just below the surface, about one third of Mars is covered in ice. We study this ice to learn about Mars’ ancient climate and astronauts’ future water supplies.

Sometimes we see the buried ice because cliffs form like the one in this image. On the brownish, dusty cliff wall, the faint light-blue-colored ice shows through. Some of these cliffs change before our eyes and boulders of ice can tumble downhill. We take repeat images of these scenes to check for changes like this.

Written by: Shane Byrne  (6 October 2020)
 
Acquisition date
15 August 2020

Local Mars time
15:35

Latitude (centered)
-57.041°

Longitude (East)
47.226°

Spacecraft altitude
249.6 km (155.1 miles)

Original image scale range
25.1 cm/pixel (with 1 x 1 binning) so objects ~75 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
5.4°

Phase angle
45.4°

Solar incidence angle
50°, with the Sun about 40° above the horizon

Solar longitude
259.0°, Northern Autumn

For non-map projected images
North azimuth:  98°
Sub-solar azimuth:  23.5°
JPEG
Black and white
map projected  non-map

IRB color
map projected  non-map

Merged IRB
map projected

Merged RGB
map projected

RGB color
non-map projected

JP2
Black and white
map-projected   (427MB)

IRB color
map-projected   (233MB)

JP2 EXTRAS
Black and white
map-projected  (154MB)
non-map           (282MB)

IRB color
map projected  (50MB)
non-map           (222MB)

Merged IRB
map projected  (120MB)

Merged RGB
map-projected  (116MB)

RGB color
non map           (223MB)
ADDITIONAL INFORMATION
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products
HiView

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.