- DISCOVERY (6)
- Pad 39-A (32)
- 20th Shuttle mission
- 6th Flight OV-103
- Shortened mission
- Joseph H. Engle (2), Commander
- Richard O. Covey (1), Pilot
- James D. A. van Hoften (2), Mission Specialist 1
- John M. Lounge (1), Mission Specialist 2
- William F. Fisher (1), Mission Specialist 3
- OPF - June 29,
- VAB - July 30,
- PAD - Aug. 6,
- ASC-1, AUSSAT-1, LEASAT-4, PVTOS
- August 27,
6:58:01 a.m. EDT. Launch Aug. 24 scrubbed
at T-5 minutes due to thunderstorms in vicinity. Launch Aug. 25
delayed when orbiter's number five on-board general purpose
computer failed. Launch Aug. 27 delayed three minutes, one
second due to combination of weather and unauthorized ship
entering restricted solid rocket booster recovery area.
Launch Weight: 262,309 lbs.
- Altitude: 242nm
- Inclination: 28.45 degrees
- Orbits: 112
- Duration: 7 days, 2 hours, 17 minutes, 42 seconds.
- Distance: 2,919,576 miles
- SRB: BI-020
- SRM: L020(HPM)
- ET : 21/LWT-14
- MLP : 1
- SSME-1: SN-2109
- SSME-2: SN-2018
- SSME-3: SN-2012
- September 3, 1985, 6:15:43 a.m.
PDT, Runway 23, Edwards Air Force Base,
Calif. Rollout distance: 6,100 feet. Rollout time: 47 seconds. Mission
shortened one day when AUSSAT sunshield hung up on remote manipulator system
camera and AUSSAT had to be deployed before scheduled.
returned to KSC
Sept. 8, 1985.
Landing Weight: 196,674 lbs.
Last Mission 51-F
Next Mission 51-J
- Three communications
satellites deployed: ASC-1 , for American
Satellite Company; AUSSAT-1, an Australian
Satellite; and SYNCOM IV-4, the Synchronous
Satellite. ASC-1 and AUSSAT-1 both attached to Payload Assist
Module-D (PAM-D) motors. SYNCOM IV-4
(also known as LEASAT-4)
failed to function after reaching correct geosynchronous orbit.
Fisher and van Hoften performed 11 hours, 27 minutes of space walk.
Part of time spent retrieving, repairing and redeploying LEASAT-3,
deployed on Mission 51-D.
Middeck Payload: Physical Vapor Transport
Organic Solid Experiment (PVTOS).
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