Lacchini is a lunar impact crater situated on the far side of the Moon, making it perpetually out of sight from Earth. It is located in the northern hemisphere of the Moon, with approximate selenographic coordinates of 40.8° N latitude and 143.2° W longitude.
The crater is named in honor of Giovanni Lacchini (1884–1967), a distinguished Italian amateur astronomer particularly known for his extensive observations of variable stars. The International Astronomical Union (IAU) officially approved this name in 1970.
Lacchini has an estimated diameter of approximately 58 to 60 kilometers. It is characterized by a relatively well-defined and sharp outer rim that shows minimal signs of erosion, suggesting it is a comparatively fresh formation. The crater's overall shape is circular. Its inner walls exhibit some slumping or terracing, descending towards a relatively flat and level interior floor. A modest central peak rises from the center of the crater floor.
Lacchini is positioned to the north of the larger crater Tikhov and to the southwest of the crater Freundlich, forming part of a cluster of craters in this particular region of the lunar far side. Its distinct and largely intact features contrast with the more degraded appearance of older lunar impact structures.