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S
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1108
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E
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104 km
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''Unknown''
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250
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is a
Lunar Crater that lies on the
Far Side of the
Moon , between
Hilbert Crater to the north-northwest and
Milne Crater to the south-southeast. To the south-southwest lies the
Scaliger Crater . Named after the American astronomer,
Harold Alden .
The Alden crater has a low rim that is overlain in the north and northeast by the 'Alden C' and smaller 'Alden E' craters. The rim is worn and eroded, with a low gap along the southern wall. The floor is somewhat irregular. Crater 'Alden V' lies just inside the north rim, and is attached to 'Alden C' to the east.
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 Alden crater.