Ninth Discovery flight. Department of Defense mission. Data classified. Landed at Edwards Airforce Base November 27, 1989. Mission Duration: 120 hours 6 minutes 46 seconds.

Launch Date: November 22, 1989 Launch Vehicle: Discovery Crew: Commander: Frederick D. Gregory, Pilot: John E. Blaha, Mission Specialists: Manley L. Carter, Franklin Musgrave, Kathryn C. Thornton