Ludwig is a small lunarimpact crater that is located just beyond the eastern limb of the Moon, placing it on the far side from the Earth. It lies just to the east of the much larger crater Hirayama, and to the north of Ganskiy.
The rim of this crater is worn, and is somewhat lower in the northern half. The inner walls are uneven slopes that lead down to the interior floor. Three small craters lie on the floor, with a joined pair located to the north of the midpoint and the other along the southwest inner wall. The floor is otherwise relatively level and featureless.
References
Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.
Menzel, D. H.; Minnaert, M.; Levin, B.; Dollfus, A.; Bell, B. (1971). "Report on Lunar Nomenclature by the Working Group of Commission 17 of the IAU". Space Science Reviews12 (2): 136–186. doi:10.1007/BF00171763. Bibcode: 1971SSRv...12..136M.