Fans and Valleys
NASA/JPL/University of Arizona
Fans and Valleys
ESP_055110_2265  Science Theme: Landscape Evolution
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An impact crater approximately 23 kilometers across is home to fan-shaped deposits that extend from the rim and sit on the interior crater floor.

Thick beds with varying tone are exposed along the edge of the fan. Shallow valleys that carve into the smooth upland surfaces outside of the crater may provide clues regarding the formation of the deposits. Many boulder-sized blocks sit on the interior crater floor beyond the toe (distal edge) of the deposits.

This fan-hosting crater is located near the boundary between Tempe Terra and Acidalia Planitia in the Northern Hemisphere of Mars.

Written by: Sharon Wilson Purdy (audio: Tre Gibbs)  (23 July 2018)
 
Acquisition date
29 April 2018

Local Mars time
15:17

Latitude (centered)
46.280°

Longitude (East)
308.117°

Spacecraft altitude
302.0 km (187.7 miles)

Original image scale range
60.4 cm/pixel (with 2 x 2 binning) so objects ~181 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
0.4°

Phase angle
59.1°

Solar incidence angle
59°, with the Sun about 31° above the horizon

Solar longitude
167.3°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  337.9°
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   (264MB)

IRB color
map-projected   (151MB)

JP2 EXTRAS
Black and white
map-projected  (116MB)
non-map           (132MB)

IRB color
map projected  (47MB)
non-map           (122MB)

Merged IRB
map projected  (264MB)

Merged RGB
map-projected  (243MB)

RGB color
non map           (115MB)
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.