Horrocks (crater)

Horrocks
Coordinates 4°00′S 5°54′E / 4.0°S 5.9°E / -4.0; 5.9Coordinates: 4°00′S 5°54′E / 4.0°S 5.9°E / -4.0; 5.9
Diameter 30 km
Depth 3.0 km
Colongitude 355° at sunrise
Eponym Jeremiah Horrocks
Oblique view from Apollo 16
Horrocks at the terminator from Apollo 11

Horrocks is a lunar impact crater located entirely within the eroded northeast rim of the much larger walled plain Hipparchus. To the south of Horrocks are the craters Halley and Hind, Rhaeticus is to the north, and Pickering to the northeast distancing only at the range of 25 km. Gyldén and Saunder lie to the west and east, respectively.

Its diameter is 30 km long and is 3,000 meters deep, also, the area is around 700 km².

The rim of Horrocks is somewhat irregular and polygonal, particularly with an outward protrusion on the eastern rim. It has a small outer rampart. The inner wall is slumped, particularly along the northwest where it forms a heap of talus. The interior floor is uneven, and it has a central mountain and hills. The crater is approximately 30 kilometers in diameter and 3 kilometers deep. It is from the Eratosthenian period, which lasted from 3.2 to 1.1 billion years ago.[1]

Names

The crater Horrocks was named after the 17th-century English astronomer Jeremiah Horrocks.[1] It was the nearly exact location of the Michael van Langren's 1645 map which calls it "Slauatae", which was also "Slavatae".[2][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 Horrocks.[4]

Horrocks Latitude Longitude Diameter
M 4.0° S 7.6° E 5 km
U 3.2° S 4.8° E 4 km

References

  1. 1 2 Autostar Suite Astronomer Edition. CD-ROM. Meade, April 2006.
  2. ↑ Ewen A. Whitaker, Mapping and Naming the Moon (Cambridge University Press, 1999).
  3. ↑ Langrenus map of the Moon (1645)
  4. ↑ Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 0-521-81528-2.
  • Wood, Chuck (February 9, 2006). "Layers of History". Lunar Photo of the Day. Archived from the original on August 26, 2017.
  • Wood, Chuck (May 27, 2007). "Drawings". Lunar Photo of the Day. Archived from the original on September 10, 2017.
  • Wood, Chuck (April 30, 2009). "A Little Bit About a Normal Crater (written as A Little Bit about a Normal Crater)". Lunar Photo of the Day.
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