S84-43708 (11 Oct 1984) --- These five crewmembers are scheduled to fly aboard the Space Shuttle Challenger for Mission STS-51C, scheduled for January of next year. Astronauts Thomas K. (Ken) Mattingly II (kneeling right) and Loren J. Shriver (kneeling left) are commander and pilot, respectively. Astronauts James F. Buchli (standing center) and Ellison L. Onizuka (right) are mission specialists. Gary E. Payton of the U.S. Air Force, left, is payload specialist. The crewmembers, holding their launch and entry helmets, were photographed with their crew insignia.