A Winter’s View of a Gullied Crater
NASA/JPL/University of Arizona
A Winter’s View of a Gullied Crater
ESP_049083_2320  Science Theme: Mass Wasting Processes


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This is the location with the most impressive known gully activity in the Northern hemisphere. Gullies are active in the winter due to carbon dioxide frost, but northern winters are shorter and warmer than southern winters, so there is less frost and less gully activity.

An enhanced-color image cutout shows recent gullies with bright colors.

Written by: Alfred McEwen (audio: Tre Gibbs)  (18 April 2017)
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Acquisition date
15 January 2017

Local Mars time:
13:55

Latitude (centered)
51.667°

Longitude (East)
333.017°

Range to target site
307.6 km (192.2 miles)

Original image scale range
61.5 cm/pixel (with 2 x 2 binning) so objects ~185 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
3.5°

Phase angle:
80.0°

Solar incidence angle
78°, with the Sun about 12° above the horizon

Solar longitude
299.4°, Northern Winter

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  304.1°
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   (170MB)

IRB color
map-projected   (101MB)

JP2 EXTRAS
Black and white
map-projected  (69MB)
non-map           (83MB)

IRB color
map projected  (23MB)
non-map           (66MB)

Merged IRB
map projected  (170MB)

Merged RGB
map-projected  (162MB)

RGB color
non map           (67MB)
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/University of Arizona

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.