Soyuz-U from Baikonur Site 31 launched Progress 5, an uncrewed cargo freighter delivering propellant, food, and equipment to Salyut 6 for the EO-3 resident crew of Lyakhov and Ryumin.
- Outcome
- Success
- Payload to orbit
- 8.8 T (est.)
- Flight
- 140th
- of 714 Soyuz U flights
- Date and time
- 12 March 1979, 05:47 UTC
- Rocket
- Soyuz U
- Builder
- Progress RSC
- Launch site
- 31/6, Baikonur Cosmodrome, Republic of Kazakhstan
- Payload
- Unknown
- International designator
- 1979-022
- Launches in 1979
- 23rd of 110
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