To Ngoc Van (crater)

To Ngoc Van (crater)
Planet Mercury

52°18′N 110°42′W / 52.3°N 110.7°W / 52.3; -110.7Coordinates: 52°18′N 110°42′W / 52.3°N 110.7°W / 52.3; -110.7

Diameter 63 km[1]
Eponym To Ngoc Van [2]

To Ngoc Van is a pit-floored crater on Mercury, which was discovered in January 2008 during the first flyby of the planet by MESSENGER spacecraft.[1] Its floor displays an irregularly shaped collapse feature, which is called a central pit. The size of the pit is 21 × 10 km.[1] Such a feature may have resulted from collapse of a magma chamber underlying the central part of the crater. The collapse feature is an analog of Earth's volcanic calderas.[1]


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