Seneca 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...

 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 towards the east-northeastern limb, less than one crater diameter to the north of Plutarch

Plutarch (crater)

Plutarch is a lunar impact crater that lies near the north-northeastern limb of the Moon, just to the south of the irregular crater Seneca. To the southeast is the flooded crater Cannon...

. To the northwest is the crater Hahn

Hahn (crater)

Hahn is a lunar impact crater that is located near the northeastern limb of the Moon. The crater appears oval when viewed from the Earth due to foreshortening. It is located less than one crater diameter to the southeast of Berosus, a slightly smaller formation.The inner wall of Hahn contains a...

, and due north lies the large walled plain Gauss

Gauss (crater)

Gauss is a large lunar crater, named after Carl Friedrich Gauss, that is located near the northeastern limb of the Moon's near side. It belongs to a category of lunar formations called a walled plain, meaning that it has a diameter of at least 110 kilometers, with a somewhat sunken floor and little...

.

This crater has been heavily eroded by impacts, with an outer rim that has been distorted and overlain by several small craters. It appears roughly diamond-shaped as viewed from above, although it is heavily foreshortened when seen from the Earth

Earth

Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...

. A small crater lies along the western rim and inner wall. The small crater Seneca D is attached to the eastern exterior. There is also a smaller crater across the northern apex of the rim. The interior floor is somewhat irregular, particularly in the southern half.

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 Seneca.

Seneca	Latitude	Longitude	Diameter
A	26.4° N	75.7° E	17 km
B	27.2° N	77.4° E	28 km
C	26.3° N	75.1° E	22 km
D	26.6° N	81.3° E	18 km
E	29.2° N	79.6° E	16 km
F	29.5° N	81.9° E	15 km
G	29.4° N	83.2° E	19 km