Kidinnu is an 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...

 on 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. It lies to the south of the crater H. G. Wells

H. G. Wells (crater)

H. G. Wells is a lunar crater that is located on the far side of the Moon, behind the northeastern limb. It lies to the south of the crater Millikan, and to the northeast of Cantor. Just to the southeast is the smaller Tesla....

 and to the southeast of Cantor

Cantor (crater)

Cantor is a lunar impact crater that is located on the northern hemisphere on the far side of the Moon. The outer rim of the crater has a distinctly hexagonal shape, and is slightly longer in the north–south direction. The interior walls are multiply terraced, although less so along the western rim...

.

This is a somewhat unevenly formed crater with an outer rim that forms a rounded polygon

Polygon

In geometry a polygon is a flat shape consisting of straight lines that are joined to form a closed chain orcircuit.A polygon is traditionally a plane figure that is bounded by a closed path, composed of a finite sequence of straight line segments...

. The inner wall varies in width, with the narrowest stretch along the outward-bulging northeast. There are no craters of note along the rim or within the interior. The interior floor is uneven, with a central ridge that runs to the southern edge.

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater mid-point that is closest to Kidinnu.

Kidinnu	Latitude	Longitude	Diameter
E	36.3° N	124.5° E	60 km