Ammonius (crater)

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Ammonius (crater)
240px
Oblique view from Apollo 14
Coordinates Lua error in package.lua at line 80: module 'strict' not found.
Diameter 9 km
Depth 1.9 km
Colongitude 1° at sunrise
Eponym Ammonius Hermiae

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. In the past this crater was identified as Ptolemaeus A, before being named by the IAU.

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.

References

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