Riedel 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 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...

. It is located to the north-northeast of the crater Karrer

Karrer (crater)

Karrer is a lunar impact crater that is located in the southern hemisphere on the far side of the Moon. It lies to the northeast of the crater Minkowski, and south of Leavitt....

, and due south of Leavitt

Leavitt (crater)

Leavitt is a crater on the far side of the Moon. It is a moderately eroded crater, but only a few minor craterlets lie along the edge and interior. Most of these features lie within the northern half of the crater, but the largest lies along the southern inner wall. The crater has a low central...

.

This is a worn crater with smaller craters along the rim to the north and southwest. There is a small craterlet along the southern inner wall. The interior floor appears relatively free of distinguishing features, with only a small craterlet in the southern part of the floor.

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 Riedel.

Riedel	Latitude	Longitude	Diameter
G	49.2° S	133.6° W	26 km
Q	49.9° S	141.7° W	25 km
Z	47.4° S	139.7° W	30 km