Windows to Ancient Mars
NASA/JPL/University of Arizona
Windows to Ancient Mars
ESP_020799_1385  Science Theme: Composition and Photometry
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The Argyre impact basin contains some ancient eroded terrains, exposing rocks with diverse compositions, as shown by the color variability.

These are windows into ancient Mars, which was a wetter world than Mars today.

Written by: Alfred McEwen  (2 February 2011)
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Acquisition date
03 January 2011

Local Mars time:
15:44

Latitude (centered)
-41.047°

Longitude (East)
321.685°

Range to target site
255.5 km (159.7 miles)

Original image scale range
51.1 cm/pixel (with 2 x 2 binning) so objects ~153 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
0.3°

Phase angle:
56.7°

Solar incidence angle
57°, with the Sun about 33° above the horizon

Solar longitude
210.2°, Northern Autumn

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  19.4°
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   (89MB)

IRB color
map-projected   (38MB)

JP2 EXTRAS
Black and white
map-projected  (33MB)
non-map           (58MB)

IRB color
map projected  (9MB)
non-map           (42MB)

Merged IRB
map projected  (82MB)

Merged RGB
map-projected  (78MB)

RGB color
non map           (41MB)
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.