Siedentopf is a worn 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 lies to the east-southeast of the larger crater Vernadskiy

Vernadskiy (crater)

Vernadskiy is a lunar crater on the far side of the Moon, behind the visible eastern limb. It lies to the west-northwest of the smaller crater Siedentopf. To the south is Gavrilov, and much farther to the west is Meggers....

. Farther to the south is Hoffmeister

Hoffmeister (crater)

Hoffmeister is a lunar crater that is located on the Moon's far side, to the northwest of the huge walled plain Mendeleev. Some distance to the north of Hoffmeister lies the crater Siedentopf, and to the west-northwest is Gavrilov....

.

The northwestern section of the crater rim has been damaged, but the remainder of the rim is only moderately worn. The satellite crater Siedentopf Q intrudes into the rim along the southwestern side, and the rampart of this impact covers a portion of the interior floor of Siedentopf. The remainder of the floor is marked by some small craterlets.

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 Siedentopf.

Siedentopf	Latitude	Longitude	Diameter
F	22.1° N	138.5° E	42 km
G	20.5° N	138.4° E	61 km
H	20.9° N	137.2° E	42 km
M	19.0° N	135.5° E	31 km
Q	20.7° N	133.7° E	42 km