Chappe is a
lunar impact crater
An impact crater is a circular depression in the surface of a solid astronomical object formed by the hypervelocity impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal collapse, impact crater ...
that lies along the southwestern limb of the
Moon
The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth (comparable to the width of ...
. It is nearly attached to the northern limb of the walled plain
Hausen, and an equal distance from the crater
Pilâtre. To the north-northwest is
Blanchard.
This crater lies along the outer
rampart
Rampart may refer to:
* Rampart (fortification), a defensive wall or bank around a castle, fort or settlement
Rampart may also refer to:
* "O'er the Ramparts We Watched" is a key line from "The Star-Spangled Banner", the national anthem of the ...
of the much larger Hausen, and is surrounded by uneven, hummocky terrain. The rim is roughly circular, with a small crater lying along the eastern edge. The inner walls and interior floor are uneven, particularly in the western half.
This crater was originally designated Hausen A before being assigned its current name by the
IAU
The International Astronomical Union (IAU; french: link=yes, Union astronomique internationale, UAI) is a nongovernmental organisation with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach ...
in 1994.
Chappe lies to the south of the
Mendel-Rydberg Basin
The Mendel-Ryberg Basin is a Nectarian impact basin on the southwestern limb of the moon. It is named after the crater Mendel on the west margin and the smaller crater Rydberg north of the center of the basin. The basin is due south of the la ...
, a 630 km wide impact basin of
Nectarian age.
References
*
*
*
*
*
*
*
*
*
*
*
*
{{refend
Impact craters on the Moon