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A Hard Rain's A-Gonna Fall
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A Hard Rain's A-Gonna Fall
Release Date: May 26, 2011

Date acquired: May 04, 2011
Image Mission Elapsed Time (MET): 213027360
Image ID: 212660
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: -26.28°
Center Longitude: 318.9° E
Resolution: 138 meters/pixel
Scale: The scene is about 92 km (57 mi.) wide.
Incidence Angle: 69.7°
Emission Angle: 39.2°
Phase Angle: 108.9°

Of Interest: This view of Mercury's surface reveals an abundance of subdued craters that are about 5 km in diameter. These are probably old secondary craters, formed as large chunks ejected by a basin impact fell as a pummeling rain.

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.

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

For information regarding the use of MESSENGER images, see the image use policy.


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