Distinct Gullies
Distinct Gullies
ESP_022225_1305  Science Theme: Mass Wasting Processes
This observation had two objectives: 1) image a distinct, fresh-looking gully imaged by MOC; 2) look for change detection in the apron of another sharp-looking gully that was imaged in ESP_015988_1305.

HiRISE can help view fine-scale morphology, as in this subimage, as well as change detection. With a stereo pair, we can also look for fresh material.

This caption is based on the original science rationale.

Written by: HiRISE Science Team  (27 May 2011)
Acquisition date
24 April 2011

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
248.3 km (154.3 miles)

Original image scale range
24.9 cm/pixel (with 1 x 1 binning) so objects ~75 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
40°, with the Sun about 50° above the horizon

Solar longitude
279.9°, Northern Winter

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  26.7°
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   (465MB)

IRB color
map-projected   (203MB)

Black and white
map-projected  (202MB)
non-map           (279MB)

IRB color
map projected  (62MB)
non-map           (212MB)

Merged IRB
map projected  (118MB)

Merged RGB
map-projected  (113MB)

RGB color
non map           (219MB)
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.