Southern Winter Frost Accumulations
Southern Winter Frost Accumulations
ESP_044909_1450  Science Theme: Composition and Photometry
This enhanced color HiRISE image shows several craters somewhere in the southern mid-latitudes of Mars. It is currently mid-winter in the Southern hemisphere, so we can observe accumulating frost (neon blues) on pole-facing slopes (i.e. south-facing) and in shadowed areas.

However, the bluish deposits and ejecta deposits associated with the smaller crater we see are not consistent with frost deposits. These materials are most likely iron-bearing minerals that have not been previously oxidized (i.e., rusted), and have only recently been exposed to the surface when this small well-preserved crater was formed.

Written by: Livio Tornabene (audio: Tre Gibbs)  (4 May 2016)
Acquisition date
24 February 2016

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
253.9 km (157.8 miles)

Original image scale range
51.1 cm/pixel (with 2 x 2 binning) so objects ~153 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
74°, with the Sun about 16° above the horizon

Solar longitude
113.7°, Northern Summer

For non-map projected images
North azimuth:  96°
Sub-solar azimuth:  50.4°
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   (233MB)

IRB color
map-projected   (152MB)

Black and white
map-projected  (123MB)
non-map           (121MB)

IRB color
map projected  (54MB)
non-map           (144MB)

Merged IRB
map projected  (236MB)

Merged RGB
map-projected  (215MB)

RGB color
non map           (132MB)
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/JPL/University of Arizona

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.