A Classic Bowl on Mars
NASA/JPL/University of Arizona
A Classic Bowl on Mars
ESP_020245_2190  Science Theme: Glacial/Periglacial Processes
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The 4 kilometer (2.5 mile) diameter crater in this image appears relatively fresh, but not remarkably so. It's not terribly small, or terribly large. It does have several nice gullies, the original justification for taking an image here, mostly in the shadowed portion of the crater walls. In addition, it is a very well-formed example of a simple bowl-shaped crater.

The reason for the term "bowl shape" is readily apparent from the HiRISE image, which shows a nearly circular, raised rim and steep, smoothly sloping walls. This form is representative of relatively small craters everywhere in the solar system: at larger sizes, the shape of the crater profile changes.

The diameter at which craters begin to transition from this simple bowl shape to more complex forms depends on the material properties of the surface and the surface gravity, but on Mars it is about 7 kilometers (not quite 4.5 miles). As crater diameter increases, peaks, pits, or rings of peaks start to form at the center, and the rim begins to slump into terraces.

Written by: Nicole Baugh  (4 January 2011)

This is a stereo pair with ESP_020667_2190.

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Acquisition date
21 November 2010

Local Mars time:

Latitude (centered)

Longitude (East)

Range to target site
297.0 km (185.7 miles)

Original image scale range
29.7 cm/pixel (with 1 x 1 binning) so objects ~89 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle:

Phase angle:

Solar incidence angle
63°, with the Sun about 27° above the horizon

Solar longitude
184.7°, Northern Autumn

North azimuth:

Sub-solar azimuth:
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   (675MB)

IRB color
map-projected   (301MB)

Black and white
map-projected  (335MB)
non-map           (295MB)

IRB color
map projected  (106MB)
non-map           (238MB)

Merged IRB
map projected  (165MB)

Merged RGB
map-projected  (158MB)

RGB color
non map           (228MB)
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

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

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.