Chekhov’s Tectonics

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Caption:

We last saw the 200-km-diameter Chekhov impact basin during a solar storm at Mercury . In this image, with north to the bottom, the inner portion of this peak-ring basin is visible -- as are the tectonic landforms to which it plays host. These structures appear to be lobate scarps , formed when one block of crust thrusts up and over another, in response to the global contraction of Mercury as its core cooled and solidified.

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 28, 2012
Image Mission Elapsed Time (MET): 254658983
Image ID: 2475678
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: -36.56°
Center Longitude: 298.02° E
Resolution: 124 meters/pixel
Scale: The vertical field of view in this image is approx. 20 km (13 mi.) across
Incidence Angle: 68.4°
Emission Angle: 43.9°
Phase Angle: 112.3°

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. 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, MDIS acquired 88,746 images and extensive other data sets. MESSENGER is now in a year-long extended mission, during which plans call for the acquisition of more than 80,000 additional images to support MESSENGER's science goals.

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 .

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