Image: Craters in the center of Apollo basin (36°S, 209°E) named after Space Shuttle Challenger astronauts, LROC WAC mosaic, ~190 km wide [NASA/GSFC/Arizona State University].
Apollo is a 524 km-diameter impact basin located within the center of the the giant South Pole-Aitken basin. Apollo is also a Constellation Project Region of Interest, identified by NASA as a notional area for future human lunar exploration. The Constellation Region of Interest is located in the southwest corner of the mare deposit that fills this basin-within-a-basin. After the loss of the Space Shuttle Challenger, seven craters on the eastern rim of this basin were named after the crew: Gregory Jarvis, Christa McAuliffe, Ronald McNair, Ellison Onizuka, Judith Resnik, Dick Scobee, Michael Smith. Go to the WAC mosaic of the entire Apollo basin and surroundings. More information and images at LROC