This image of an as-yet-unnamed crater was taken using the Mercury Dual Imaging System (MDIS) pivot and Narrow Angle Camera (NAC) . The perpendicular lines that traverse the crater are secondary crater chains caused by ejecta from two primary impacts outside of the field of view.
This image was acquired as part of MDIS's high-resolution surface morphology base map. The surface morphology base map will cover more than 90% of Mercury's surface with an average resolution of 250 meters/pixel (0.16 miles/pixel or 820 feet/pixel). Images acquired for the surface morphology base map typically have off-vertical Sun angles (i.e., high incidence angles) and visible shadows so as to reveal clearly the topographic form of geologic features.
April 24, 2011
Image Mission Elapsed Time (MET): 212153114
Image ID: 171577
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: 2.22°
Center Longitude: 216.0° E
Resolution: 233 meters/pixel
Scale: This image is 116.5 km across.
Incidence Angle: 69.7°
Emission Angle: 7.3°
Phase Angle: 62.4°
On March 17, 2011 (March 18, 2011, UTC), MESSENGER became the first spacecraft ever to orbit the planet Mercury . The mission is currently in its commissioning phase, during which spacecraft and instrument performance are verified through a series of specially designed checkout activities. In the course of the one-year primary mission, the spacecraft's seven scientific instruments and radio science investigation will unravel the history and evolution of the Solar System's innermost planet. Visit the Why Mercury? section of this website to learn more about the science questions that the MESSENGER mission has set out to answer.
These images are from MESSENGER, a NASA Discovery mission to conduct the first orbital study of the innermost planet, Mercury. For information regarding the use of images, see the MESSENGER image use policy .
|Instrument||Mercury Dual Imaging System (MDIS)|
|Detector||Narrow Angle Camera (NAC)|
|Extra Keywords||Crater, Grayscale, Impact, Map, Radio, Shadow|
|Date in Caption||2011-04-24|
|Image Credit||NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington|