A Small, Double-Ringed Crater
A Small, Double-Ringed Crater
ESP_028162_2310  Science Theme: Impact Processes
This small, 230-meter crater formed by the impact of an asteroid onto a lobate flow deposit on Mars.

These deposits are surmised to have formed by the flow of glacial material on the surface of the planet. Ground-penetrating radar data from SHARAD, the radar sounder aboard MRO, show that a large abundance of ice is under the surface.

The impact penetrated through the material and into the substrate and formed this "double crater" as it excavated material from these two layers of different strengths.

Written by: Eldar Noe (audio by Tre Gibbs)  (19 September 2012)

This is a stereo pair with ESP_028083_2310.
Acquisition date
29 July 2012

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
306.7 km (190.6 miles)

Original image scale range
30.7 cm/pixel (with 1 x 1 binning) so objects ~92 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
55°, with the Sun about 35° above the horizon

Solar longitude
147.0°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  340.2°
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   (648MB)

IRB color
map-projected   (335MB)

Black and white
map-projected  (264MB)
non-map           (317MB)

IRB color
map projected  (88MB)
non-map           (241MB)

Merged IRB
map projected  (186MB)

Merged RGB
map-projected  (179MB)

RGB color
non map           (229MB)
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

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.