The crater Matabei, shown here, exhibits a dark ray system projecting from one side of the crater. Rays emanating from only certain sides of the crater can be due to an impactor that came in at a grazing angle, such as seen for the craters Hovnatanian and Qi Baishi. However dark rays like these can also indicate an irregular distribution of dark material below the surface. The dark rays are likely sub-surface material that was excavated and ejected out during the initial impact. It is also interesting to note the extensive hollows, identifiable as the bright regions in the southern half of the crater.
Date acquired: August 30, 2011
Image Mission Elapsed Time (MET): 223185654
Image ID: 695876
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: -40.07°
Center Longitude: 345.8° E
Resolution: 98 meters/pixel
Scale: Matabei is 24 km. in diameter (15 mi.)
Incidence Angle: 42.4°
Emission Angle: 6.4°
Phase Angle: 46.6°
Photo credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
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