PIA17405: Dark Side of the Force

Dark Side of the Force


The crater Matabei, shown here, exhibits a dark ray system projecting from one side of the crater. Rays emanating from only certain sides of the crater can be due to an impactor that came in at a grazing angle, such as seen for the craters Hovnatanian and Qi Baishi . However dark rays like these can also indicate an irregular distribution of dark material below the surface. The dark rays are likely sub-surface material that was excavated and ejected out during the initial impact. It is also interesting to note the extensive hollows , identifiable as the bright regions in the southern half of the crater.

This image was acquired as a high-resolution targeted observation. Targeted observations are images of a small area on Mercury's surface at resolutions much higher than the 200-meter/pixel morphology base map. It is not possible to cover all of Mercury's surface at this high resolution, but typically several areas of high scientific interest are imaged in this mode each week.

Date acquired: August 30, 2011
Image Mission Elapsed Time (MET): 223185654
Image ID: 695876
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: -40.07°
Center Longitude: 345.8° E
Resolution: 98 meters/pixel
Scale: Matabei is 24 km. in diameter (15 mi.)
Incidence Angle: 42.4°
Emission Angle: 6.4°
Phase Angle: 46.6°

Background Info:

The MESSENGER spacecraft is the first ever to orbit the planet Mercury, and the spacecraft's seven scientific instruments and radio science investigation are unraveling the history and evolution of the Solar System's innermost planet. MESSENGER acquired over 150,000 images and extensive other data sets. MESSENGER is capable of continuing orbital operations until early 2015.

For information regarding the use of images, see the MESSENGER image use policy .

Cataloging Keywords:

Name Value Additional Values
Target Mercury
Target Type Planet
Instrument Host MESSENGER
Host Type Orbiter
Instrument Mercury Dual Imaging System (MDIS)
Detector Narrow Angle Camera (NAC)
Extra Keywords Crater, Grayscale, Impact, Map, Radio
Acquisition Date
Release Date 2013-08-12
Date in Caption 2011-08-30
Image Credit NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
Source photojournal.jpl.nasa.gov/catalog/PIA17405
Identifier PIA17405