Crater Billy, located at 50.1° W, 13.8° S on the lunar surface at the southern edge of Oceanus Procellarum, has a diameter of 46 km and is up to 1.3 km deep.
Billy is filled with dark mare material and is one of the darkest spots on the lunar surface. The crater is deemed to be of age class 5 - indicating an ancient crater [in this case at least 3.2 billion years old] and filled, or partially filled with lava.
The image represents a composite made from two raw images (i.e. no flat field or other corrections have been applied) of the region taken one orbit apart.