Geological Chronicle
Sabine forms a matching pair with Ritter to the northwest, their rims separated by only a couple of kilometers. The circular rim encloses an interior floor with a pair of small craterlets, a central rise, and a western ridge concentric with the inner wall. To the west lies the bowl-shaped crater Schmidt, while Manners and Arago sit farther to the north.
Lunar geologists originally classified Sabine and Ritter as calderas rather than impact craters. The structure lacked radial rim ejecta, secondary craters, and a deep floor, while aligning along the Hypatia rilles at the mare edge. Studies following the Apollo landings revealed that enhanced isostatic uplift raised the floor, as thin crust and heat inside the basin lowered substrate viscosity.
About 85 kilometers to the east-southeast lies Tranquility Base, the Apollo 11 landing site. Prior to impacting Mare Tranquillitatis, the Ranger 8 spacecraft flew over Sabine, and three of the crater's former satellite features were subsequently renamed Aldrin, Collins, and Armstrong by the IAU.