October 6, 2008
Image Mission Elapsed Time (MET):
Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
190 meters/pixel (0.12 miles/pixel)
The bottom of this image is about 190 kilometers (120 miles) across
7,400 kilometers (4,600 miles)
Taken about 28 minutes following MESSENGER's closest approach during the mission's second Mercury flyby, this NAC image, just one of a large mosaic set, focuses in on an impact basin with a nicely developed peak-ring structure. Subsequent impact events have resulted in smaller craters superimposed on top of the larger peak-ring basin. This basin is located in the un-imaged "gore" region in the Mariner 10 coverage
of Mercury's surface, a gap that has largely been filled
by images from MESSENGER's recent Mercury flyby. Peak-ring structures form during the impact process and can be found in many large basins on Mercury's surface. Check out the image released on June 17
for other examples of peak rings on Mercury.
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.