This kidney-shaped depression lies along the inner margin of the Caloris basin and was first imaged during MESSENGER's first flyby of the innermost planet. The rimless, non-circular depression is the vent of a small, explosive volcano, similar to other volcanic vents on Mercury. The small number of superposed craters indicates that this feature is relatively young.
Date acquired: June 07, 2011
Image Mission Elapsed Time (MET): 215894570
Image ID: 347724
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: 22.5°
Center Longitude: 146.1° E
Resolution: 28 meters/pixel
Scale: The depression is approximately 23 km (14 mi.) across its longest dimension.
Incidence Angle: 39.6°
Emission Angle: 45.5°
Phase Angle: 78.3°
Photo credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
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