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Last updated on April 23, 2014 at 21:24 EDT
Target Lock
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Target Lock

May 2, 2012
Date acquired: January 23, 2012 Image Mission Elapsed Time (MET): 235766888, 235766929, 235766969 Image ID: 1300010, 1300011, 1300012 Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS) Center Latitude: 21.90° Center Longitude: 1.78° E Resolution: 57 meters/pixel Scale: De Graft crater is approximately 68 km (42 mi.) in diameter. Incidence Angle: 73.5° Emission Angle: 37.1° Phase Angle: 110.7° Of Interest: De Graft crater was named for 20th century Ghanaian playwright, poet, and novelist Joe de Graft following MESSENGER's second flyby of the innermost planet. De Graft is a complex crater that hosts numerous bright hollows on its floor. This image is a mosaic of three NAC images taken as a sequence designed to target 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 250-meter/pixel (820 feet/pixel) morphology base map or the 1-kilometer/pixel (0.6 miles/pixel) color base map. It is not possible to cover all of Mercury's surface at this high resolution during MESSENGER's one-year mission, but several areas of high scientific interest are generally 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, MDIS is scheduled to acquire more than 75,000 images in support of MESSENGER's science goals. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington