Most of Ridge Section 124 is taken up by the enormous
          crater Hertzsprung, which is 591 km wide. This crater is
          located on the lunar Far Side beyond the western limb. This
          formation is larger than several of the mare areas on the near
          side. It lies in the northwestern fringe of the blast radius
          of the Mare Orientale impact basin. Nearby craters of note
          include Michelson across the northeast rim (out of frame),
          Vavilov across the western rim, and Lucretius to the southeast
          (also out of frame). The outer rim of Hertzsprung has been
          damaged and modified by several notable impacts (mentioned
          above) and a number of smaller craters. A chain of small
          craters, designated Catena Lucretius, begins at the outer
          southeastern outer rim and proceeds toward the west-northwest
          until it connects with the perimeter of the inner basin. This
          inner area is less rough than the outer ring of the floor, and
          is surrounded by a circular range of ridges. The inner
          perimeter is also pierced by several craters, including
          Hertzsprung D along the eastern portion and Hertzsprung S on
          the western side. Nor is the interior of the inner basin free
          from impacts, including K, H, X, and L. The equator of the
          Moon passes through this formation, being located to the south
          of the midpoint and cutting through the central basin.
          (Credit: Most of the information used in this section feature
          descriptions obtained from 
wikipedia.org.
          Section 112 and this directory was created by Fran Ridge and
          Ned Haskin of The Lunascan Project).