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Delisle crater (above) and Diophantus (below) from Apollo 15 '' NASA  photo''
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276
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N
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343
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W
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19 km
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30 km
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34
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is a
Lunar Impact Crater that lies in the southwest part of the
Mare Imbrium . It forms a pair with the larger
Delisle Crater to the north. Diophantus has a wide inner wall and a low central rise. To the north of Diophantus is the sinuous
Rille designated ''Rima Diophantus'', being named after the crater. There is a tiny craterlet near the exterior of the southwest wall.
This cleft follows a generally east-west path across the Mare Imbrium. It is centered at selenographic coordinates 31.0° N, 32.0° W, and has a maximum diameter of 150 km. Several tiny craters near this rille have been assigned names by the
IAU . These are listed in the table below.
By convention these features are identified on lunar maps by placing the letter on the side of the crater mid-point that is closest to Diophantus crater.
The following craters have been renamed by the
IAU .
