Fans on Crater Rims
NASA/JPL/University of Arizona
Fans on Crater Rims
ESP_046332_1040  Science Theme: Seasonal Processes

AUDIO

Listen to the text

WALLPAPER

800  1024
1152  1280
1440  1600
1920  2048
2560  2880
4K  8K

HIFLYER

PDF, 11 x 17 in

HISLIDES

PowerPoint
Keynote
PDF
Gas under pressure will choose an easy escape route. In this image, the terrain is covered with a seasonal layer of dry ice.

The weak spots, for gas sublimating from the bottom of the seasonal ice layer to escape, appear to be around craters, where the surface was broken and pulverized by an impact. Fans of surface material deposited on top of the seasonal ice layer show where the escape vents are.

This target was identified by the citizen scientists at Planetfour: Terrains.

Written by: Candy Hansen (audio: Tre Gibbs)   (14 December 2016)

Click to share this post on Twitter Click to share this post on Facebook Click to share this post on Google+ Click to share this post on Tumblr
 
Acquisition date
14 June 2016

Local Mars time:
16:08

Latitude (centered)
-75.815°

Longitude (East)
228.941°

Range to target site
248.7 km (155.5 miles)

Original image scale range
99.5 cm/pixel (with 4 x 4 binning) so objects ~299 cm across are resolved

Map projected scale
100 cm/pixel

Map projection
Polarstereographic

Emission angle:
1.6°

Phase angle:
86.9°

Solar incidence angle
88°, with the Sun about 2° above the horizon

Solar longitude
168.9°, Northern Summer

North azimuth:
102°

Sub-solar azimuth:
40.5°
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   (59MB)

IRB color
map-projected   (36MB)

JP2 EXTRAS
Black and white
map-projected  (40MB)
non-map           (41MB)

IRB color
map projected  (21MB)
non-map           (39MB)

Merged IRB
map projected  (67MB)

Merged RGB
map-projected  (62MB)

RGB color
non map           (37MB)
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
For information about NASA and agency programs on the Web, visit: http://www.nasa.gov. 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. Lockheed Martin Space Systems is the prime contractor for the project and built the spacecraft. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona. The image data were processed using the U.S. Geological Survey’s ISIS3 software.