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Letronne from Apollo 16 '' NASA  photo''
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106
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S
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424
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W
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120 km
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10 km
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42
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is the
Lava -flooded remnant of a
Lunar Crater . The northern part of the rim is completely missing, and opens into the
Oceanus Procellarum , forming a bay along the southwestern shore. The formation is located to the northwest of the large
Gassendi Crater .To the west-southwest is the flooded
Crater Billy , and north-northwest lies the smaller
Flamsteed Crater .
The surviving rim of Letronne is now little more than a semi-curcular series of ridges. The flooded, broken rim of
Winthrop Crater overlays the western wall. The rim is the most intact along the eastern stretch, forming a mountainous promontory into the
Mare . A small cluster of central rises lie at the mid-point of the crater. A
Wrinkle-ridge traverses the floor from north to south, and outline a portion of the missing rim. The crater floor is otherwise nearly smooth and relatively free of craterlets, with the exception of 'Letronne B' near the southeast rim.
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 Letronne crater.
The following craters have been renamed by the
IAU .
