August 27, 2012
Image Mission Elapsed Time (MET):
Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
The horizontal field of view in this image is approx. 80 km (50 mi.) across
Of Interest: Firdousi crater
, located close to Mercury's equator, is a flat-floored crater that may have been filled with volcanic material
subsequent to its formation. Although many craters on Mercury are filled with impact melt
, the shallow depth of Firdousi suggests that lava is the culprit, almost entirely obscuring its central peak
and covering many of the landslide deposits
around the crater's inner wall. Firdousi is also surrounded by prominent secondary crater chains, many of which have haloes of high-reflectance, relatively blue ejecta
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.
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. Visit the Why Mercury?
section of this website to learn more about the key science questions that the MESSENGER mission is addressing. During the one-year primary mission, MESSENGER acquired 88,746 images and extensive other data sets. MESSENGER is now in a yearlong extended mission, during which plans call for the acquisition of more than 80,000 additional images to support MESSENGER's science goals.
Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
For information regarding the use of MESSENGER images, see the image use policy.