Chebyshev

[crater] The outer rim of this walled plain is eroded and somewhat irregular, although much of the perimeter can still be discerned. The outer rampart of Langmuir spills into the interior, forming a rough patch in the southeastern floor. Several craters lie along the western rim, most notably Chebyshev U. The rim of this last crater is shar...
Found on http://en.wikipedia.org/wiki/Chebyshev_(crater)
No exact match found