Erosion Features near the South Pole of Mars
NASA/JPL/University of Arizona
Erosion Features near the South Pole of Mars
ESP_022998_0980  Science Theme: Seasonal Processes
Greek  Italian  Spanish 

WALLPAPER

800  1024
1152  1280
1440  1600
1920  2048
2560

HIFLYER

PDF, 11 x 17 in

HISLIDES

PowerPoint
Keynote
PDF
This HiRISE image shows erosional features formed by seasonal frost near the south pole of Mars.

During the winter, high latitudes (near the pole) on Mars build up deposits of carbon dioxide frost that can be several feet thick. In the spring these sublimate and turn back into gas. The gas sublimating at the bottom of the frost can move the underlying dust and even erode channels in it.

These channels form a variety of structures; examples like those at this site have been nicknamed "spiders" because many channels converge, giving a many-armed, spidery appearance.

This observation forms a stereo pair with ESP_023117_0980, and HiRISE has produced an anaglyph.

Written by: Colin Dundas   (13 July 2011)

This is a stereo pair with ESP_023117_0980.

Click to share this post on Twitter Click to share this post on Facebook Click to share this post on Google+ Click to share this post on Tumblr
 
Acquisition date
23 June 2011

Local Mars time:
15:29

Latitude (centered)
-81.693°

Longitude (East)
66.311°

Range to target site
247.3 km (154.6 miles)

Original image scale range
24.7 cm/pixel (with 1 x 1 binning) so objects ~74 cm across are resolved

Map projected scale
25 cm/pixel

Map projection
Polarstereographic

Emission angle:
3.0°

Phase angle:
66.3°

Solar incidence angle
68°, with the Sun about 22° above the horizon

Solar longitude
316.0°, Northern Winter

North azimuth:
110°

Sub-solar azimuth:
54.8°
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   (824MB)

IRB color
map-projected   (431MB)

JP2 EXTRAS
Black and white
map-projected  (541MB)
non-map           (577MB)

IRB color
map projected  (228MB)
non-map           (416MB)

Merged IRB
map projected  (222MB)

Merged RGB
map-projected  (217MB)

RGB color
non map           (408MB)
ANAGLYPHS
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

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
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.