Doppelmayer is the remains of 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...

 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 southwest edge of Mare Humorum

Mare Humorum

Mare Humorum is a lunar mare. The impact basin it is located in is 825 kilometers across. It was not sampled by the Apollo program, so a precise age has not been determined. However, geological mapping indicates that it is intermediate in age between the Imbrium and Nectaris Basins, suggesting an...

. To the south-southeast is another flooded crater designated Lee

Lee (crater)

Lee is the lava-flooded remnant of a lunar crater that lies on an inlet of the Mare Humorum, in the southwestern part of the Moon. To the east is the crater Vitello, and just to the north is the lava-flooded crater Doppelmayer....

, and to the southeast is Vitello

Vitello (crater)

Vitello is a lunar crater that lies along the southern edge of the small Mare Humorum, in the southwest part of the Moon's near side. It lies just to the east of the lava-flooded crater Lee. To the northeast along the edge of the lunar mare is the Rupes Kelvin, an irregular fault line.This crater...

. Just to the east-northeast of Doppelmayer lies the nearly submerged crater Puiseux

Puiseux (crater)

Puiseux is the remnant of a lunar crater that has been almost completely submerged by lava. It is located near the southern end of Mare Humorum, to the north east of the ruined crater Doppelmayer. To the south-southeast is Vitello. Of the original structure of Puiseux, only the upper part of the...

.

The rim of Doppelmayer is nearly round, but is worn and eroded. The most intact section is the southwest half, while in the northeast the rim descends beneath the mare

Lunar mare

The lunar maria are large, dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions. They were dubbed maria, Latin for "seas", by early astronomers who mistook them for actual seas. They are less reflective than the "highlands" as a result of their iron-rich compositions, and...

, leaving only a slight rise in the surface. The interior has been flooded by lava, leaving a large raised ridge in the center. A small range of hills curves to the west and north from the southern end of this ridge, forming a feature that is nearly concentric with the crater's outer rim.

The crater is named after Johan Gabriel Doppelmayr

Johan Gabriel Doppelmayr

Johann Gabriel Doppelmayr was a German mathematician, astronomer, cartographer, and wrote about sundials....

 by Johann Hieronymus Schröter in 1791

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 Doppelmayer.

Doppelmayer	Latitude	Longitude	Diameter
A	29.8° S	43.1° W	10 km
B	30.5° S	45.4° W	11 km
C	30.3° S	44.1° W	7 km
D	31.8° S	45.8° W	9 km
G	28.9° S	44.9° W	15 km
H	28.8° S	43.2° W	10 km
J	24.5° S	41.1° W	6 km
K	24.0° S	40.7° W	5 km
L	23.6° S	40.5° W	4 km
M	29.5° S	43.9° W	15 km
N	29.2° S	44.6° W	5 km
P	29.1° S	42.7° W	8 km
R	29.2° S	43.2° W	4 km
S	28.1° S	43.6° W	4 km
T	25.9° S	43.2° W	3 km
V	29.8° S	45.6° W	8 km
W	33.6° S	45.6° W	8 km
Y	33.1° S	46.1° W	10 km
Z	33.0° S	46.4° W	10 km