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STS-51-D

Mission insignia
Mission statistics
Mission name:	STS-51-D
Shuttle:	Discovery
Launch pad:	39-A
Launch:	April 12, 1985, 8:59:05 a.m. EST
Landing:	April 19, 1985, 8:54:28 a.m. EST, KSC, Runway 33
Duration:	Six days, 23 hours, 55 minutes, 23 seconds
Orbit altitude:	285 nautical miles (528 km)
Orbit inclination:	28.5 degrees
Distance traveled:	2,889,785 miles (4,650,658 km)
Crew photo
Back row L-R: Griggs, Patrick Baudry, Garn Front row: L-R: Bobko, Williams, Seddon, Hoffman
Navigation
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STS 51-D was the sixteenth flight of a Space Shuttle and the fourth flight of Discovery. It conducted the fifth landing at Kennedy Space Center.

Contents 1 Crew 2 Mission parameters 2.1 Space walk 3 Mission highlights 4 See also 5 Notes 6 External links

(total flights to date in parentheses)

• Karol J. Bobko (2), Commander
• Donald E. Williams (1), Pilot
• M. Rhea Seddon (1), Mission Specialist 1
• Jeffrey A. Hoffman (1), Mission Specialist 2
• S. David Griggs (1), Mission Specialist 3
• Charles D. Walker^[1] (2), Payload Specialist 1
• Jake Garn (1), Payload Specialist 2, Republican senator from Utah (He was the first sitting member of Congress in space and is sometimes considered the first space tourist.)

• Mass:
  • Orbiter Liftoff: 113,802 kg
  • Orbiter Landing: 89,816 kg
  • Payload: 16,249 kg
• Perigee: 445 km
• Apogee: 535 km
• Inclination: 28.5°
• Period: 94.4 min

• Hoffman and Griggs - EVA 1
• EVA 1 Start: April 16, 1985
• EVA 1 End: April 16, 1985
• Duration: 3 hours, 06 minutes

TELESAT-l (ANIK C-1) communications satellite deployed, attached to Payload Assist Module (PAM-D) motor. SYNCOM IV-3 (also known as LEASAT-3) deployed. but spacecraft sequencer failed to initiate antenna deployment, spin.up and ignition of perigee kick motor. Mission extended two days to make certain sequencer start lever in proper position. Griggs and Hoffman performed space walk to attach Flyswatter devices to remote manipulator system. Seddon engaged LEASAT lever using remote manipulator system but post deployment sequence did not begin. Other payloads: Continuous Flow Electrophoresis System (CFES) III, flying for sixth time; two Shuttle Student Involvement Program (SSIP) experiments; American Flight Echocardiograph (AFE); two Getaway Specials; Phase Partitioning Experiments (PPE); astronomy Photography verification test; medical experiments and "toys in space," an informal study of the behavior of simple toys in weightless environment, with results to be made available to school students. Extensive brake damage and blown tire during landing prompted landing of future flights at Edwards Air Force Base until implementation of nose wheel steering.

• Space science
• Space shuttle
• List of space shuttle missions
• List of human spaceflights chronologically

1. ^ According to the Nasa web page [1]. But the crew photo shows Patrick Baudry (back row, second from left), as can be seen by the CNES logo on the suit of that person

• NASA mission summary
• mission-51-d