Petrie is a relatively small lunar

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...

 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...

 that is located to the east of the much larger walled plain Fabry

Fabry (crater)

Fabry is a large lunar crater of the form termed a walled plain. It is located on the far side of the Moon, just beyond the northeastern limb. Parts of this area are sometimes brought into view by the effects of libration, but the terrain is seen from the edge and so not much in the way of detail...

. To the east is the smaller crater Rayet

Rayet (crater)

Rayet is a small lunar impact crater that lies on the far side of the Moon, past the northeast limb. It lies to the southwest of the larger crater Millikan, and east of the comparably sized Petrie....

. Most of the rim of Petrie is sharp-edged, with a deposit of scree

Scree

Scree, also called talus, is a term given to an accumulation of broken rock fragments at the base of crags, mountain cliffs, or valley shoulders. Landforms associated with these materials are sometimes called scree slopes or talus piles...

along the base of the inner wall. There is an outward bulge to the rim along the southwest, where the surface has slumped into the interior.

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 Petrie.

Petrie	Latitude	Longitude	Diameter
U	45.6° N	106.3° E	20 km