Large Crater Northwest of Lomonosov Crater
Large Crater Northwest of Lomonosov Crater
ESP_025228_2550  Science Theme: Fluvial Processes
This observation was suggested by 7th and 8th graders at Evergreen Middle School (California). Here was their rationale for having HiRISE target this area:

“In order to understand the weathering processes and how it may affect the Martian landscape, it is important to look at features like frost and see if that has any effect on the ground it covers.”

They picked a good target! This cutout shows a portion of the dunes located in the center of the crater, covered with sublimating frost (when the frost goes directly into a gaseous state). The dark spots are defrosted material, easily visible against the lighter frosted surface.

Written by: HiRISE Science Team  (20 February 2013)

This is a stereo pair with ESP_024925_2550.
Acquisition date
14 December 2011

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
318.1 km (197.7 miles)

Original image scale range
64.3 cm/pixel (with 2 x 2 binning) so objects ~193 cm across are resolved

Map projected scale
50 cm/pixel

Map projection

Emission angle

Phase angle

Solar incidence angle
60°, with the Sun about 30° above the horizon

Solar longitude
43.1°, Northern Spring

For non-map projected images
North azimuth:  104°
Sub-solar azimuth:  315.9°
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   (463MB)

IRB color
map-projected   (259MB)

Black and white
map-projected  (255MB)
non-map           (192MB)

IRB color
map projected  (104MB)
non-map           (198MB)

Merged IRB
map projected  (449MB)

Merged RGB
map-projected  (401MB)

RGB color
non map           (182MB)
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.