Southern Hemisphere Craters

Looking toward the horizon, you get a sense of what it might be like to ride along with MESSENGER, taking in the view. In this look at the limb, the large crater near the center is approximately 110 km (68 miles) across. Because the angle between the Sun and the spacecraft is large (a phase angle of 141.6°), we see only the shadowed walls of most small craters, giving the surface a speckled appearance.

This image was acquired as part of MDIS's limb imaging campaign. Once per week, MDIS captures images of Mercury's limb, with an emphasis on imaging the southern hemisphere limb. These limb images provide information about Mercury's shape and complement measurements of topography made by the Mercury Laser Altimeter (MLA) of Mercury's northern hemisphere.

Date acquired: July 16, 2013
Image Mission Elapsed Time (MET): 16312930
Image ID: 4453973
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: -49.77°
Center Longitude: 352.9° E
Resolution: 183 meters/pixel
Scale: The bright crater at center is approximately 110 km (68 mi.) in diameter
Incidence Angle: 60.7°
Emission Angle: 80.9°
Phase Angle: 141.6°

Photo credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington