STS-51A

**STS-51A**
Organization	NASA-Office of Space Flight (United States)
Mission type	Human Crew
Launch date	November 8, 1984
Launch vehicle	Space Shuttle
Launch site	Cape Canaveral, United States
COSPAR ID	1984-113A
Inclination	28.5 degrees
Experiments	Here
Alternate Names	STS 14,15382
Additional Information	Here
Data Collection	Here
Payload Mass Up	20523 kg
Payload Mass Down	11296.82 kg
Orbiter	Discovery
Lift Off Mass	2,054,500.45 kg
Orbiter Weight at Liftoff	119,692.73 kg
Orbiter Weight at Landing	94,320.45 kg
Landed	Runway 15 at Kennedy Space Center, Fla.
Orbits of Earth	126
Orbital Altitude	161 nautical miles (185 statute miles)

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[edit] Crew

Commander: Frederick Hauck
Pilot: David Walker
- Payload Commander:
- Mission Specialist 1: Joseph Allen
- Mission Specialist 2: Anna Fisher
- Mission Specialist 3: Dale Gardner
- Mission Specialist 4:
- Mission Specialist 5:
- Payload Specialist 1:
- Payload Specialist 2:

ISS/Mir Crew Transport

[edit] Mission

STS 51-A was the second Discovery shuttle flight. On board were Frederick Hauck, David Walker, Joseph Allen, Anna Fisher, and Dale Gardner. Canadian communications satellite TELESAT-H (ANIK), attached to Payload Assist Module-D (PAM-D), was deployed into geosynchronous orbit on flight day two. On third day, defense communications satellite SYNCOM IV-I (also known as LEASAT-1) was deployed. Allen and Gardner, wearing jet-propelled manned maneuvering units, retrieved two malfunctioning satellites: PALAPA-B2 and WESTAR-VI, both deployed on Mission 41-B. Fisher operated the remote manipulator system, grappling the satellites and depositing them in the payload bay. Middeck payloads consisted of: Diffusive Mixing of Organic Solutions (DMOS), and Radiation Monitoring Equipment (RME). The mission duration was 191 hours 44 minutes 56 seconds.

[edit] EVA

Extravehicular Activity (EVA) conducted by Joseph Allen and Dale Gardner during two spacewalks for a total of 12 hours, 14 minutes. EVA 1, 6 hours, 13 minutes; EVA 2, 6 hours and 1 minute. Manned maneuvering unit (MMU) operating time Allen 2 hours, 22 minutes, Gardner 1 hour, 40 minutes.

[edit] Payload

Telesat (Canada communications satellite)-H with Payload Assist Module (PAM)-D deployment, Syncom IV-1 communications satellite deployment with its unique stage; retrieval of PALAPA B-2 and WESTAR VI communications satellites with PAM-D that failed to ignite on the STS-41-B mission. Manned maneuvering unit (MMU) used for retrieval. Diffusive Mixing of Organic Solutions (DMOS) experiment

Mission patch: