Geological Chronicle
Sacrobosco is an irregular impact crater located in the rugged southern highlands to the west of the Rupes Altai escarpment. It spans 97.67 kilometers across and lies near neighboring landmarks, with the double crater Abenezra and Azophi to the northwest, Fermat to the east-northeast, and Pontanus to the south-southwest.
Dating to the Pre-Nectarian epoch on the lunar geologic timescale, the crater rim is heavily worn and eroded, especially in the northeast. The floor is relatively flat in the south, except where overlain by Sacrobosco A and B, but becomes somewhat irregular in the northeast.
The formation is readily identified by the three circular craters on its floor. The crater commemorates John of Holywood, also known as Johannes Sacrobuschus, a British astronomer and mathematician active during the thirteenth century.