Berkner 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 is located on the
far side 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 ...
, just past the western limb. It is attached to the east-southeast rim of the crater
Parenago. Just to the south is the
Robertson
Robertson may refer to:
People
* Robertson (surname) (includes a list of people with this name)
* Robertson (given name)
* Clan Robertson, a Scottish clan
* Robertson, stage name of Belgian magician Étienne-Gaspard Robert (1763–1837)
Places ...
, and to the southeast is
Helberg.
The outer rim of this crater has been worn and eroded, particularly along the northwest half. The most intact part of the rim is to the southeast, while the remainder has been impacted and notched by smaller impacts, and to the southwest overlain by material.
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 Berkner.
References
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Impact craters on the Moon
{{Craters on the Moon: A–B