Earth-based telescopic image                                Lunar Orbiter image
Flooded  crater, Stadius, right of center. (Image by Legault) 
Larger version of above, but rotated 180
Full-sized version of LO4 image
An interesting group of craters north-north-west of the flooded crater Stadius and reaching as far as the edge of Mare Imbrium, where it continues in the form of a rille composed of crater pits. They are obviously secondary formations related to the origin of nearby Copernicus (See LO4-121H2 below). The crater at upper right is Eratosthenes. The large crater is Copernicus. 
Other Lunar Orbiter images
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This web page was created by Francis Ridge for The Lunascan Project:
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