An Irregular Crater Intersecting Graben in Tractus Albus
An Irregular Crater Intersecting Graben in Tractus Albus
ESP_035226_2090  Science Theme: Fluvial Processes
This crater, of which only a small portion is visible in the full HiRISE image, is very irregularly shaped and might suggest that some underlying liquid was present that made it so elongated after the initial impact.

Another reason for the crater’s shape might be that it was caused by a binary asteroid pair or a meteorite that broke into multiple fragments just before hitting the ground leading to the formation of a number of superimposed craters that produced this odd-shaped depression. Such craters have been previously observed by HiRISE.

The crater itself intersects a graben, which is a depressed stretch of land typically bordered by parallel faults. Note the dark streak on the crater’s eastern wall.

Written by: HiRISE Science Team (narration: Tre Gibbs)  (2 April 2014)
Acquisition date
31 January 2014

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
285.7 km (177.6 miles)

Original image scale range
57.2 cm/pixel (with 2 x 2 binning) so objects ~172 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
42°, with the Sun about 48° above the horizon

Solar longitude
83.5°, Northern Spring

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  12.6°
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   (224MB)

IRB color
map-projected   (122MB)

Black and white
map-projected  (118MB)
non-map           (107MB)

IRB color
map projected  (49MB)
non-map           (119MB)

Merged IRB
map projected  (241MB)

Merged RGB
map-projected  (220MB)

RGB color
non map           (111MB)
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’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.