Launched Progress M-42, an uncrewed cargo craft that delivered supplies to the Mir space station, docking at the Kvant port on July 18, 1999. It remained attached to Mir after the station's last resident crew departed that September.
- Outcome
- Success
- Payload to orbit
- 9.6 T
- Flight
- 640th
- of 714 Soyuz U flights
- Date and time
- 16 July 1999, 16:37 UTC
- Rocket
- Soyuz U
- Builder
- Progress RSC
- Launch site
- 1/5, Baikonur Cosmodrome, Republic of Kazakhstan
- Payload
- Unknown
- International designator
- 1999-038
- Launches in 1999
- 40th of 78
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