Colombo 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...

 that lies on the strip of rough continental terrain between Mare Fecunditatis

Mare Fecunditatis

Mare Fecunditatis is a lunar mare which is 840 km in diameter. The Fecuditatis basin formed in the Pre-Nectarian epoch, while the basin material surrounding the mare is of the...

 to the east and Mare Nectaris

Mare Nectaris

The Sea of Nectar is a small lunar mare or sea located between the Sea of Tranquillity and the Sea of Fecundity . Montes Pyrenaeus borders the mare to the west and the large crater near the south center of the mare is known as Rosse...

 in the west. It is located to the south of the crater Goclenius

Goclenius (crater)

Goclenius is a lunar crater that is located near the west edge of Mare Fecunditatis. It lies to the southeast of the lava-flooded crater Gutenberg, and north of Magelhaens. To the northwest is a parallel rille system that follow a course toward the northwest, running for a length of up to 240...

, and northwest of Cook

Cook (crater)

Cook is a lunar crater that lies in the western part of the Mare Fecunditatis, just to the southeast of the prominent crater Colombo. To the southwest is Monge....

.

The rim of Colombo is circular, although slightly indented along the northwest where Colombo A intrudes slightly into the interior. The inner wall is asymmetrical, being much more narrow to the north and northwest and wider to the southeast. The rim is somewhat eroded, and several tiny craterlets lie along the inner wall to the southeast. The small satellite crater Colombo B lies across the south-southwestern rim.

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 Colombo.

Colombo	Latitude	Longitude	Diameter
A	14.1° S	44.4° E	42 km
B	16.4° S	45.2° E	16 km
E	15.8° S	42.4° E	17 km
G	13.9° S	43.9° E	10 km
H	17.4° S	44.1° E	14 km
J	14.3° S	43.5° E	7 km
K	15.8° S	46.4° E	5 km
M	14.6° S	47.8° E	17 km
P	15.1° S	48.0° E	5 km
T	18.9° S	45.4° E	10 km