HiRISE | Large Crater Northwest of Lomonosov Crater (ESP_025228

NASA/JPL-Caltech/UArizona

Large Crater Northwest of Lomonosov Crater
ESP_025228_2550 Science Theme: Fluvial Processes

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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 (narration: Tre Gibbs) (20 February 2013)

This is a stereo pair with ESP_024925_2550.

Acquisition date
14 December 2011

Local Mars time
13:57

Latitude (centered)
75.057°

Longitude (East)
340.131°

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
Polarstereographic

Emission angle
8.1°

Phase angle
66.4°

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°

JPEG
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

JP2
Black and white
map-projected   (463MB)

IRB color
map-projected   (259MB)

JP2 EXTRAS
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)

ANAGLYPHS
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

ADDITIONAL INFORMATION
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products
HiView

NB
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

USAGE POLICY
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-Caltech/UArizona

POSTSCRIPT
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.