Letronne (crater)

Short description: Crater on the Moon

Letronne

Letronne from Apollo 16. NASA photo.

Diameter| 120 km
Depth| 1.0 km
Colongitude| 42° at sunrise
Lunar Orbiter 4 image of Letronne. Note higher sun angle than the Apollo 16 image above. Another view of eastern Letronne, from Apollo 16

Letronne is the lava-flooded remnant of a lunar impact crater. It was named after French archaeologist Jean-Antoine Letronne.[1] 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,[2] 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.[3]

## 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.

* Letronne D -- See Scheele.
* Letronne P -- See Winthrop.

## References

1. ↑ "Letronne (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
2. ↑ Map quadrangle LAC-75, Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program
3. ↑ 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.

* Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.
* Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 978-0-521-81528-4.
* Cocks, Elijah E.; Cocks, Josiah C. (1995). Who's Who on the Moon: A Biographical Dictionary of Lunar Nomenclature. Tudor Publishers. ISBN 978-0-936389-27-1. https://archive.org/details/isbn_9780936389271.
* McDowell, Jonathan (July 15, 2007). "Lunar Nomenclature". Jonathan's Space Report. http://host.planet4589.org/astro/lunar/.
* Menzel, D. H.; Minnaert, M.; Levin, B.; Dollfus, A.; Bell, B. (1971). "Report on Lunar Nomenclature by the Working Group of Commission 17 of the IAU". Space Science Reviews 12 (2): 136–186. doi:10.1007/BF00171763. Bibcode: 1971SSRv...12..136M.
* Moore, Patrick (2001). On the Moon. Sterling Publishing Co.. ISBN 978-0-304-35469-6. https://archive.org/details/patrickmooreonmo00patr.
* 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. https://archive.org/details/celestialobjects00webb.
* 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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