Letronne (crater)
Template:Short description Template:More footnotes Template:Infobox Lunar crater
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Letronne is the lava-flooded remnant of a lunar impact crater. It was named after French archaeologist Jean-Antoine Letronne.<ref>Template:Gpn</ref> 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 crater Gassendi.To the west-southwest is the flooded crater Billy, and north-northwest lies the smaller Flamsteed.
The surviving rim of Letronne is now little more than a semi-circular series of ridges. The flooded, broken rim of Winthrop overlies 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 midpoint of the crater. The wrinkle ridge Dorsa Rubey traverses the floor from north to south,<ref>Map quadrangle LAC-75, Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program</ref> and outlines 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.
Letronne is one of the largest craters of Lower (Early) Imbrian age.<ref>The geologic history of the Moon. USGS Professional Paper 1348. By Don E. Wilhelms, John F. McCauley, and Newell J. Trask. U.S. Government Printing Office, Washington: 1987. Table 10.2.</ref>
Satellite craters
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Letronne.
| Letronne | Latitude | Longitude | Diameter |
|---|---|---|---|
| A | 12.1° S | 39.1° W | 7 km |
| B | 11.2° S | 41.2° W | 5 km |
| C | 10.7° S | 38.5° W | 4 km |
| F | 9.2° S | 46.1° W | 8 km |
| G | 12.7° S | 46.5° W | 10 km |
| H | 12.6° S | 46.0° W | 4 km |
| K | 14.5° S | 43.6° W | 5 km |
| L | 14.3° S | 44.3° W | 5 km |
| M | 12.0° S | 44.1° W | 3 km |
| N | 12.3° S | 39.8° W | 4 km |
| T | 12.5° S | 42.6° W | 3 km |
The following craters have been renamed by the IAU.