Cailleux (crater)
Encyclopedia
Cailleux is a lunar
Moon
The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...

 impact crater
Impact crater
In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body...

 that is attached to the southwest rim of the walled plain Poincaré
Poincaré (crater)
Poincaré is a large lunar impact basin that lies in the southern hemisphere on the far side of the Moon. Most of the formation has been heavily eroded by subsequent impacts, leaving a battered formation with only rugged remnants of the original outer rim to the west.The eastern half has been...

. It is located in the southern part of the Moon
Moon
The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...

's far side, and cannot be seen from the Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...

. To the southeast of Cailleux is the crater Lyman
Lyman (crater)
Lyman is a lunar impact crater that lies in the southern hemisphere on the far side of the Moon. It is located to the south of the huge walled plain Poincaré, and to the northeast of Schrödinger, another walled plain...

, and nearly due westward is Prandtl
Prandtl (crater)
Prandtl is an impact crater on the far side of the Moon. It lies across the southeastern outer rim of the huge walled plain Planck.This crater is roughly circular, but with an outward bulge to the south-southeast. The rim is worn but still retains a well-defined edge...

.

This crater is named after the late French scientist Andre de Cayeux de Senarpont who used the pseudonym of Andre Cailleux for all his published materials.

The crater is circular and symmetrical, with a worn rim and inner wall that is marked by a number of tiny craterlets. Most of the inner wall slopes gently down to the interior floor, and lacks terraces or other detail. At the bottom the floor is level and relatively featureless, with only a few tiny craters to mark the surface.
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