STS-51I Mission Patch
Item #: MP51I
20th Space Shuttle Mission 6th Flight of Discovery Crew: Joseph H. Engle, Commander Richard O. Covey, Pilot James D.A. van Hoften, Mission Specialist John M. Lounge, Mission Specialist William F. Fisher, Mission Specialist Three communications satellites were deployed during the mission. These included ASC-1 for American Satellite Company, AUSSAT-1 for Australia, both of which employed PAM-D solid rocket motors. SYNCOM-IV-4 (also called LEASAT-4) reached geosynchronous orbit but failed to operate.