STS-41-B
STS-41-B was NASA's tenth Space Shuttle mission and the fourth flight of the Space Shuttle Challenger. It launched on 3 February 1984 and landed on 11 February 1984, after deploying two communications satellites. It was also notable for including the first untethered spacewalk.
Bruce McCandless II demonstrates the Manned Maneuvering Unit (MMU), floating in space above a clouded Earth. | |
| Names | Space Transportation System-41B STS-11 |
|---|---|
| Mission type | Communications satellites deployment Equipment testing |
| Operator | NASA |
| COSPAR ID | 1984-011A |
| SATCAT no. | 14681 |
| Mission duration | 7 days, 23 hours, 15 minutes, 55 seconds (achieved) |
| Distance travelled | 5,329,150 km (3,311,380 mi) |
| Orbits completed | 128 |
| Spacecraft properties | |
| Spacecraft | Space Shuttle Challenger |
| Launch mass | 113,603 kg (250,452 lb) |
| Landing mass | 91,280 kg (201,240 lb) |
| Payload mass | 12,815 kg (28,252 lb) |
| Crew | |
| Crew size | 5 |
| Members | |
| EVAs | 2 |
| EVA duration | 12 hours, 12 minutes First: 5 hours, 55 minutes Second: 6 hours, 17 minutes |
| Start of mission | |
| Launch date | 3 February 1984, 13:00:00 UTC |
| Rocket | Space Shuttle Challenger |
| Launch site | Kennedy Space Center, LC-39A |
| Contractor | Rockwell International |
| End of mission | |
| Landing date | 11 February 1984, 12:15:55 UTC |
| Landing site | Kennedy Space Center, Runway 15 |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Low Earth orbit |
| Perigee altitude | 307 km (191 mi) |
| Apogee altitude | 317 km (197 mi) |
| Inclination | 28.50° |
| Period | 90.80 minutes |
| Instruments | |
| Get Away Special (GAS) canisters | |
STS-41-B mission patch Standing: Mission Specialists Robert L. Stewart, Ronald McNair and Bruce McCandless II. Stewart and McCandless are wearing Extravehicular Mobility Units (EMUs). Seated: Vance D. Brand and Robert L. Gibson | |
Following STS-9, the flight numbering system for the Space Shuttle program was changed. Because the original successor to STS-9, STS-10, was canceled due to payload delays, the next flight, originally and internally designated STS-11, became STS-41-B as part of the new numbering system.
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