HiRISE | Old Features and New (ESP_021699

NASA/JPL-Caltech/UArizona

Old Features and New
ESP_021699_1405 Science Theme: Landscape Evolution

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This image covers a portion of a typical impact crater in Terra Sirenum at about 40 degrees south latitude on Mars.

At the top of the image, outside the crater rim, there is a mid-latitude mantle, rough in places where ice may have sublimated. Below the crater rim, on the steep, south-facing slope, are gullies. These are erosional features with depositional fans. Some of the gully fans have a bluish color: these are probably quite recent deposits, less than a few tens of years old.

On the floor of the crater (bottom of the full image) are ridges that likely formed from the flow of ice, perhaps a few million years ago.

Written by: Alfred McEwen (14 February 2017)

Acquisition date
14 March 2011

Local Mars time
15:11

Latitude (centered)
-39.319°

Longitude (East)
229.703°

Spacecraft altitude
251.5 km (156.3 miles)

Original image scale range
50.3 cm/pixel (with 2 x 2 binning) so objects ~151 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
0.4°

Phase angle
43.2°

Solar incidence angle
43°, with the Sun about 47° above the horizon

Solar longitude
254.1°, Northern Autumn

For non-map projected images
North azimuth: 97°
Sub-solar azimuth: 11.8°

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   (277MB)

IRB color
map-projected   (144MB)

JP2 EXTRAS
Black and white
map-projected (135MB)
non-map           (167MB)

IRB color
map projected (58MB)
non-map           (163MB)

Merged IRB
map projected (278MB)

Merged RGB
map-projected (278MB)

RGB color
non map           (152MB)

BONUS
4K (TIFF)
8K (TIFF)

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.