Orlov (crater)

Orlov
Coordinates25°42′S 175°00′W / 25.7°S 175.0°W / -25.7; -175.0
Diameter81 km
DepthUnknown
Colongitude184° at sunrise
FormationNectarian[1]
EponymAleksandr I. Orlov
Sergei V. Orlov
Lunar Orbiter 2 image

Orlov is a lunar impact crater located on the Moon's far side,[2] to the northeast of the larger crater Leeuwenhoek. To the north-northwest of Orlov is De Vries, and to the east-southeast is Rumford.

On the lunar geologic timescale, Orlov dates to the Nectarian period.[1] This crater lies between two larger satellite craters. Orlov Y is attached to the northern rim, and Leeuwenhoek E is connected along the southwest. The latter is also the location of an outward bulge in the rim of Orlov, giving it a wider interior wall along that side. There is some terracing along the eastern inner wall of Orlov. Orlov D, an oval-shaped crater, is attached to the outer rim along the northeast.

The interior floor of Orlov is relatively level with a central ridge formation located near the midpoint. The spectra of this peak fits an olivine-bearing gabbroic norite mineralogy, which originated from a depth of 8.1 to 12.8 km.[3] There are some small craters along the extended inner wall to the southwest.

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 Orlov.

Orlov Latitude Longitude Diameter
D 24.8° S 173.4° W 27 km
Y 22.8° S 175.1° W 126 km
Oblique view of Orlov at left and Orlov Y at right, with Leeuwenhoek in left background. Facing southwest. Apollo 17 image.

References

  1. 1 2 Moriarty, D. P.; Pieters, C. M. (March 2018). "The Character of South Pole-Aitken Basin: Patterns of Surface and Subsurface Composition". Journal of Geophysical Research: Planets. 123 (3): 729–747. Bibcode:2018JGRE..123..729M. doi:10.1002/2017JE005364.
  2. ↑ Moore, Patrick (2000). The Data Book of Astronomy. CRC Press. p. 70. ISBN 978-1-4200-3344-1.
  3. ↑ Cahill, J. T. S.; et al. (September 2009). "Compositional variations of the lunar crust: Results from radiative transfer modeling of central peak spectra". Journal of Geophysical Research. 114 (E9) E09001. Bibcode:2009JGRE..114.9001C. doi:10.1029/2008JE003282.

Sources