Letronne (crater)

Letronne

Letronne from Apollo 16. NASA photo.
Coordinates 10°36′S 42°24′W / 10.6°S 42.4°W / -10.6; -42.4Coordinates: 10°36′S 42°24′W / 10.6°S 42.4°W / -10.6; -42.4
Diameter 120 km
Depth 1.0 km
Colongitude 42° at sunrise
Eponym Jean A. Letronne
Lunar Orbiter 4 image of Letronne. Note higher sun angle than the Apollo 16 image above.

Letronne 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 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. 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.

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.

References

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  • McDowell, Jonathan (July 15, 2007). "Lunar Nomenclature". Jonathan's Space Report. Retrieved 2007-10-24. 
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  • Moore, Patrick (2001). On the Moon. Sterling Publishing Co. ISBN 978-0-304-35469-6. 
  • Price, Fred W. (1988). The Moon Observer's Handbook. Cambridge University Press. ISBN 978-0-521-33500-3. 
  • Rükl, Antonín (1990). Atlas of the Moon. Kalmbach Books. ISBN 978-0-913135-17-4. 
  • Webb, Rev. T. W. (1962). Celestial Objects for Common Telescopes (6th revised ed.). Dover. ISBN 978-0-486-20917-3. 
  • Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. ISBN 978-0-521-62248-6. 
  • Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1. 
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