Dunes in Nectaris Montes
NASA/JPL/University of Arizona
Dunes in Nectaris Montes
ESP_053739_1650  Science Theme: Composition and Photometry
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Sand dunes in Valles Marineris can be impressive in size, with steep slopes that seem to climb and descend. An enhanced-color cutout shows some of these on the slopes of Nectaris Montes within Coprates Chasma.

The brighter bedforms are inactive while the bigger dunes move over the landscape, burying and exhuming the surface.

Written by: Alfred McEwen (audio: Tre Gibbs)  (14 May 2018)

This is a stereo pair with ESP_054029_1650.
 
Acquisition date
12 January 2018

Local Mars time
15:15

Latitude (centered)
-14.795°

Longitude (East)
305.416°

Spacecraft altitude
261.9 km (162.8 miles)

Original image scale range
52.4 cm/pixel (with 2 x 2 binning) so objects ~157 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
0.2°

Phase angle
61.0°

Solar incidence angle
61°, with the Sun about 29° above the horizon

Solar longitude
114.2°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  44.0°
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   (164MB)

IRB color
map-projected   (103MB)

JP2 EXTRAS
Black and white
map-projected  (85MB)
non-map           (84MB)

IRB color
map projected  (35MB)
non-map           (102MB)

Merged IRB
map projected  (159MB)

Merged RGB
map-projected  (141MB)

RGB color
non map           (89MB)
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/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.