A Collapsed Crater Rim
A Collapsed Crater Rim
ESP_049999_1450  Science Theme: Glacial/Periglacial Processes
The eastern rim of this small 3.5-kilometer crater appears to have collapsed into a much larger crater (about 14-kilometers wide). The larger crater has a large ice flow around its central peak, and is non-circular, with large blocks further suggesting structural collapse of the terrain due to what are called periglacial processes.

Understanding the composition of this small crater may inform us of the ice content of the surrounding terrain.

Written by: HiRISE Science Team  (27 November 2017)
Acquisition date
27 March 2017

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
253.2 km (157.4 miles)

Original image scale range
50.8 cm/pixel (with 2 x 2 binning) so objects ~152 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection

Emission angle

Phase angle

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

Solar longitude
339.9°, Northern Winter

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  39.9°
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   (131MB)

IRB color
map-projected   (77MB)

Black and white
map-projected  (66MB)
non-map           (71MB)

IRB color
map projected  (25MB)
non-map           (84MB)

Merged IRB
map projected  (137MB)

Merged RGB
map-projected  (125MB)

RGB color
non map           (80MB)
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.