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500BP.....Japan, launch vehicle motor, used on the Lambda-4S. stage 3. Thrust 14,500 lbf (64 kN), pressure ? psi (? bar),

50SG.....U.S., launch vehicle motor, see Orion 50SG.

50SXL.....U.S., launch vehicle motor, see Orion 50SXL.

50th Space Wing.....U.S., Air Force, organization, Schriever AFB, CO operates DoD satellites, manages the global satellite network, and controls the DSCS and NATO III constellations. Part of the 14th Air Force.

50XL.....U.S., launch vehicle motor, see Orion 50XL.

5500.....USA, satellite, Surveillance, Military. See KH-11. First launch 1976/12/19

572.....U.S., satellite, program, Interim Defense Satellite Communications System. See DSC.

581.....China, project, develop , see Project 581.

5A.....U.S., satellite, manned, ISSA, Laboratory Module. First launch 2001/02/07

5A.1.....U.S., satellite, 2001-010A,, DISCOVERY LEO, ISS 5A.1 completed, Logistics and Resupply; Lab Outfitting, LEONARDO Multi-Purpose Logistics Module (MPLM), carries equipment racks, Crew Rotation, STS 102, Kennedy LC39B. First launch 2001/03/08

5E.....U.S., satellite, scientific, Earth, Magnetosphere. First launch 1963/09/28

5K.....Russia, satellite, manned. See SEVER.

5P.....Russia, satellite, 2001-036A, PROGRESS M 45, LEO, ISS 5P, Cargo for ISS, Soyuz-U, Baykonur LC1. First launch 2001/08/21

5R.....Russia, satellite, ISS 5R, Docking Compartment (DC2), Soyuz.

5S.....Russia, satellite, Taxi Flight, Soyuz- TMA. ISS 5S. First launch 2002/11/04

5th Academy.....China, organization, see, China Academy of Space Technology.

5V.....Russia, satellite, Also known as SA VEGA. See VEGA.

5V91T.....Russia, satellite, see ASAT.

5V91T.....Russia, satellite, Military, ASAT Target. See URAN.

5VK.....Russia, satellite, Planetary, Venus. Also known as SA VEGA. See VEGA. First launch 1984/12/15


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Updated 2007/2/01