A Slice of Ice
A Slice of Ice
ESP_066552_1215  Science Theme: Glacial/Periglacial Processes
This HiRISE image shows a deposit draping the surface like a blanket. The deposit is eroding away, and near the center of the image we can see a section that is bright blue in enhanced color, although the true color is likely reddish. This scarp is exposing ice that makes up most of the mantling deposit.

Why can we only see ice on this small steep slope, instead of on level ground or the other eroded regions? The ice is covered by a layer of dust because exposed ice sublimates into the atmosphere, and only a steep, fresh exposure remains unburied.

Written by: HiRISE Science Team (narration: Tre Gibbs)  (16 December 2020)
Acquisition date
07 October 2020

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
246.5 km (153.2 miles)

Original image scale range
25.0 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

Emission angle

Phase angle

Solar incidence angle
47°, with the Sun about 43° above the horizon

Solar longitude
291.7°, Northern Winter

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  33.9°
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

Black and white
map-projected   (696MB)

IRB color
map-projected   (383MB)

Black and white
map-projected  (281MB)
non-map           (429MB)

IRB color
map projected  (104MB)
non-map           (335MB)

Merged IRB
map projected  (198MB)

Merged RGB
map-projected  (193MB)

RGB color
non map           (347MB)
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products

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

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’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.