Doppler is a 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...

 named for Christian Doppler

Christian Doppler

Christian Andreas Doppler was an Austrian mathematician and physicist.-Life and work:Christian Doppler was raised in Salzburg, Austria, the son of a stonemason. Doppler could not work in his father's business because of his generally weak physical condition...

 that is located at the southern edge of the walled plain Korolev

Korolev (lunar crater)

Korolev is a large lunar crater of the walled plain type, named for Soviet rocket engineer Sergey Korolyov. It lies on the far side of the Moon, and the northern part of its floor crosses the lunar equator...

, 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...

. To the east are the craters Das

Das (crater)

Das is a lunar impact crater on the far side of the Moon. It is located to the northwest of the walled plain Chebyshev. To the southwest of Das is the irregular crater Mariotte, and Von der Pahlen lies to the east-northeast....

 and Galois

Galois (crater)

Galois is a large lunar crater on the far side of the Moon. Features of this class are commonly termed walled plains, due to their appearance and dimension. It is located just to the southeast of another huge walled plain, Korolev, a formation nearly double the diameter of Galois...

. Farther to the southwest of Doppler is Mohorovičić

Mohorovicic (crater)

Mohorovičić is a lunar impact crater that is located on the far side of the Moon. It lies to the southwest of the larger crater Doppler and the huge walled plain Korolev. To the southwest is a small lunar mare that has been named Lacus Oblivinis....

.

The rim of Doppler has a somewhat 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...

al form, and a smaller crater is joined with the inner side of the northeast wall. The interior of Doppler is rough and irregular, with some terracing of the worn outer walls, and a complex of central hills to the north of the mid-point. The crater Doppler B lies within the northern rim, and occupies a portion of the northern floor. A small, crater-formed valley runs to the southeast across the floor of Doppler from the rim of Doppler B.

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 Doppler.

Doppler	Latitude	Longitude	Diameter
B	11.8° S	159.4° W	37 km
M	15.4° S	160.0° W	25 km
N	16.9° S	160.5° E	17 km
W	11.0° S	161.7° W	15 km
X	10.3° S	161.3° W	18 km