Dawes (lunar crater)

Dawes

Dawes from Apollo 17. NASA photo.
Coordinates 17°12′N 26°24′E / 17.2°N 26.4°E / 17.2; 26.4Coordinates: 17°12′N 26°24′E / 17.2°N 26.4°E / 17.2; 26.4
Diameter 18 km
Depth 2.3 km
Colongitude 334° at sunrise
Eponym William R. Dawes
Oblique view facing south from Apollo 17
Layers of mare basalt affected the paths of granular material that flowed down the crater wall. The top of the image is down-slope. From LRO.

Dawes is a lunar impact crater, named after William Rutter Dawes, and which is located in the wide straight between Mare Serenitatis and Mare Tranquilitatis. About 70 km southwest is the larger crater Plinius, other nearby prominent craters include Beketov nearly 75 km to the east and nearly to the southeast is Jansen. To the northeast is the Mons Argaeus mountain rise.

Its diameter is 18 km long and is 2,300 meters deep. The area is more than 225 km² and the perimeter is over 50 km.

This is a circular crater with a sharp rim that has a slightly flattened oval perimeter. It has a slight central rise, and a somewhat darker floor that is nearly covered in overlapping swirl-like deposits. Much of the deposits are slumped or fall-back material. The inner walls are steep and free from impact erosion.

Detailed examination of this crater have located what appear to be alcoves and channels along the inner rim. It is hypothesized that micrometeorite impacts along the rim trigger dry landslides, which produce a gully-like appearance. A similar phenomenon may be responsible for gully-like features along the inner rim of some Martian craters.[1]

References

  1. ↑ Stiles, Lori (2006-03-10). "Water May Not Have Formed Mars' Recent Gullies". University of Arizona. Retrieved 2015-08-04.
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  • Webb, Rev. T. W. (1962). Celestial Objects for Common Telescopes (6th revised ed.). Dover. ISBN 978-0-486-20917-3. 
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  • Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1. 
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