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Ammonius (crater)
Crater on the Moon / From Wikipedia, the free encyclopedia
Ammonius is a bowl-shaped lunar impact crater with a slightly raised rim. It is located on the floor of the walled plain Ptolemaeus, about 30 kilometers northeast of the crater midpoint.
Quick Facts Coordinates, Diameter ...
![]() Slightly oblique view from Apollo 16, facing east | |
Coordinates | 8.5°S 0.8°W / -8.5; -0.8 |
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Diameter | 9 km |
Depth | 1.9 km |
Colongitude | 1° at sunrise |
Eponym | Ammonius Hermiae |
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![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Ammonius_crater_AS14-75-10257.jpg/640px-Ammonius_crater_AS14-75-10257.jpg)
Just to the north on the lava-flooded floor of Ptolemaeus is a relatively prominent "ghost" crater: the discernible buried rim of a pre-existing crater. The diameter of this ghost crater is nearly double that of Ammonius, and is currently identified as Ptolemaeus B.