Escape from Mars!
NASA/JPL/University of Arizona
Escape from Mars!
ESP_050250_1915  Science Theme: Composition and Photometry


HICLIP

1080p (MP4)
720p (MP4)
Listen to the text

WALLPAPER

800  1024
1152  1280
1440  1600
1920  2048
2560  2880
2736  4500
4K  8K

HIFLYER

PDF, 11 x 17 in

HISLIDES

PowerPoint
Keynote
PDF
This image shows one of millions of small (10s of meters in diameter) craters and their ejecta material that dot the Elysium Planitia region of Mars. The small craters were likely formed when high-speed blocks of rock were thrown out by a much larger impact (about 10-kilometers in diameter) and fell back to the ground.

Some of these blocks may actually escape Mars, which is how we get samples in the form of meteorites that fall to Earth. Other ejected blocks have insufficient velocity, or the wrong trajectory, to escape the Red Planet. As such, when one of these high-speed blocks impacts the surface, it makes what is called a “secondary” crater. These secondaries can form dense “chains” or “rays”, which are radial to the crater that formed them.

Tycho Crater is an excellent example of a “rayed crater” that shows rays that span the entire near-side of the Moon.

Written by: Livio L. Tornabene, Jon Kissi, Zach Morse and Gavin Tolometti (audio: Tre Gibbs)  (10 July 2017)
twitter  •  facebook  •  google+  •  tumblr
 
Acquisition date
16 April 2017

Local Mars time:
14:02

Latitude (centered)
11.303°

Longitude (East)
159.640°

Range to target site
279.1 km (174.4 miles)

Original image scale range
55.8 cm/pixel (with 2 x 2 binning) so objects ~168 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
6.6°

Phase angle:
40.5°

Solar incidence angle
34°, with the Sun about 56° above the horizon

Solar longitude
350.1°, Northern Winter

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  341.0°
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   (108MB)

IRB color
map-projected   (55MB)

JP2 EXTRAS
Black and white
map-projected  (45MB)
non-map           (58MB)

IRB color
map projected  (14MB)
non-map           (60MB)

Merged IRB
map projected  (127MB)

Merged RGB
map-projected  (116MB)

RGB color
non map           (56MB)
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.