Ptolemaeus
                               Earth-based telescopic image                                  Apollo 16 image
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Larger, uncropped, version of above by
Legault 
Full-sized version of Apollo 16 image above
 AS16-0989 
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Brief
A large wall plain with considerably eroded polygonal wall. It is 153-km in diameter and has an average depth of 2400 m. What appears to be a flat floor is covered with numerous craterlets and crater pits and is rippled by shallow circular depressions which are visible only under low illumination.
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Other Lunar Orbiter images
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-108H3.jpg
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-108H2.jpg
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-101H3.jpg
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For the latest information and images regarding this section, including Apollo Hasselblad (H), Metric (M), and Panoramic (P) images, go to:
Section 44
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This web page was created by Francis Ridge for The Lunascan Project:
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