Boundary Lands
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Boundary Lands

October 28, 2013
Release Date: October 25, 2013 Topics: Caloris, Low Reflectance Material (LRM), NAC, Smooth Terrain, Tectonics, Volcanism Date acquired: July 03, 2013 Image Mission Elapsed Time (MET): 15137794 Image ID: 4370103 Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS) Center Latitude: 22.04° Center Longitude: 143.6° E Resolution: 42 meters/pixel Scale: The scene is about 57 km (35 mi.) across Incidence Angle: 68.7° Emission Angle: 31.8° Phase Angle: 100.1° North is up in this image. Of Interest: This image shows an area of the southwestern rim of the Caloris impact basin. The small hills in the lower left are part of the rim units, and the smooth surface to the right is part of the smooth plains within the basin. The scene lies right on a color boundary between darker rim material and higher-reflectance plains. Small hollows are found on the top of the hills, and small lobate scarps cross the area. The famous kidney-shaped pyroclastic vent is just to the east (right), out of the scene. 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. During the first two years of orbital operations, MESSENGER acquired over 150,000 images and extensive other data sets. MESSENGER is capable of continuing orbital operations until early 2015. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington

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