Jenner (crater)

It lies just past the southeastern limb, on the far side of the Moon, and can be viewed from the Earth during periods of favorable libration and lighting.

Nearly attached to the eastern outer rim of Jenner is the larger, flooded crater Lamb.

There are no breaks in the exterior rim where the lava could have entered the crater, so it was presumably flooded from below.

Surrounding Jenner is a rampart of ejecta that extends for over a half crater diameter in some directions.

[1] By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Jenner.

Oblique view from Apollo 15
Oblique view from Apollo 8
Mare Australe, with the circular basalt-flooded Jenner prominent in the middle.