Geological Chronicle
Located on the lunar far side, Koch is an impact crater spanning a diameter of 94.7 kilometers. The structure lies in the southern hemisphere, to the south-southeast of the walled plain Jules Verne and less than one crater diameter north of Crocco. Along its northeastern rim, a neck of uneven terrain connects Koch directly to the neighboring crater Lundmark.
Koch has a worn and eroded outer rim with small craters along its northern edge, while the satellite crater Koch U is attached to its western side. Its interior floor is also marked by small impacts, including a pair situated just north of the midpoint and another along the southern inner wall. The crater is named for Robert Koch, the German physician and Nobel laureate.