Geological Chronicle
Hopmann is an 88-kilometer crater in the southern hemisphere of the Moon's far side, attached to the northern part of the walled plain Poincaré. Less than one crater diameter to the north-northwest lies the crater Garavito. Impact erosion has degraded Hopmann's outer rim, though terrace structures remain along the southern inner walls. A small crater overlays the northern rim, and a pair of tiny craters sits along the eastern edge.
The interior floor is relatively level and has a lower albedo than the surrounding surface, giving it a slightly dark appearance. Low ridges rise near the midpoint, alongside a double-ringed rim to the south-southeast of the center. Central peak spectra match an olivine-bearing noritic gabbro mineralogy that originated from a depth of 8.8 to 14.0 kilometers.
To the northwest of the midpoint, a tiny craterlet is surrounded by a small skirt of higher-albedo material, giving it the appearance of a white patch. Hopmann also features a complex lunar swirl pattern that is associated with a weak magnetic anomaly.