Bronk is an eroded 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 lies on the far side 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...

, out of sight 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...

. It lies to the southeast of the larger crater Kovalevskaya

Kovalevskaya (crater)

Kovalevskaya is a prominent lunar impact crater that is located on the Moon's far side. It lies to the southwest of the larger walled plain Landau. To the south of Kovalevskaya are the craters Poynting and Fersman....

. Less than one crater diameter to the east-northeast is the smaller crater Bobone

Bobone (crater)

Bobone is an old, heavily eroded crater formation that lies on the far side of the Moon. Little remains of the original crater formation, leaving only a bowl-shaped depression in the surface that is pock-marked by tiny craterlets. It is attached to the southwest rim of the large satellite crater...

.

This crater has been worn and eroded by subsequent impacts. A small crater overlays the eastern rim, and much of the northeastern and northern parts of the rim have been disorganized by lesser impacts. There is a depression in the southern rim and the southwest rim has an outward bulge or slump. The interior floor is also rough and somewhat irregular, with several tiny craterlets marking the surface.