Wilhelm (crater)

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Wilhelm
Wilhelm crater 4131 h2.jpg
Coordinates43°06′S 20°48′W / 43.1°S 20.8°W / -43.1; -20.8Coordinates: 43°06′S 20°48′W / 43.1°S 20.8°W / -43.1; -20.8
Diameter107 km
Depth3.0 km
Colongitude22° at sunrise
EponymWilhelm IV

Wilhelm is a lunar impact crater in the southern part of the Moon, to the west of the prominent Tycho. Portions of the ray material from Tycho lie across the rim and floor of Wilhelm. Attached to its southern rim is the crater Montanari, while Lagalla is attached to the southwest. To the north-northeast is Heinsius.

This crater is of the type traditionally termed a walled plain. It has a heavily eroded outer rim that is overlain by several smaller craters. Among these are Wilhelm A and Wilhelm K across the southwest rim, and Wilhelm B just to the northwest along the western rim. Wilhelm C intrudes into the north-northeast rim, and Wilhelm D is attached to the northeast outer rim. There is an outward protrusion in the southern rim that extends to contact Montanari.

The interior floor of Wilhelm is relatively level, with a rougher area to the northeast. The remainder is flat and almost featureless except for a few tiny craterlets.

Satellite craters[edit]

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Wilhelm.

Wilhelm Latitude Longitude Diameter
A 44.6° S 22.0° W 20 km
B 43.5° S 22.8° W 19 km
C 41.6° S 19.5° W 15 km
D 41.8° S 17.7° W 32 km
E 44.1° S 17.9° W 14 km
F 42.4° S 23.1° W 9 km
G 42.5° S 25.9° W 17 km
H 42.5° S 23.8° W 7 km
J 41.5° S 26.2° W 19 km
K 44.1° S 21.7° W 21 km
L 40.4° S 22.1° W 9 km
M 44.0° S 17.3° W 9 km
N 43.7° S 18.5° W 7 km
O 43.1° S 17.2° W 17 km
P 40.9° S 20.5° W 12 km
Q 43.2° S 18.4° W 8 km
R 41.3° S 21.9° W 7 km
S 41.7° S 21.7° W 10 km
T 41.3° S 20.9° W 8 km
U 41.4° S 20.4° W 5 km
V 43.9° S 19.5° W 8 km
W 42.5° S 20.3° W 5 km
X 40.9° S 19.9° W 12 km
Y 44.5° S 20.9° W 5 km
Z 44.8° S 20.3° W 8 km

References[edit]

  • Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.
  • Blue, Jennifer (July 25, 2007). "Gazetteer of Planetary Nomenclature". USGS. Retrieved 2007-08-05.
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  • 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.
  • McDowell, Jonathan (July 15, 2007). "Lunar Nomenclature". Jonathan's Space Report. Retrieved 2007-10-24.
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  • 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.