Launched Kosmos 2377, a 6,500 kg Yantar-4K2 'Kobalt' photo-reconnaissance satellite, from Plesetsk for the Russian military, an upgraded, longer-lived variant of the earlier Yantar-4K1 design.
- Outcome
- Success
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- 6.6 T (est.)
- Flight
- 56th
- of 70 Soyuz-U-PVB flights
- Date and time
- 29 May 2001, 17:55 UTC
- Rocket
- Soyuz-U-PVB
- Builder
- Progress RSC
- Launch site
- 43/4 (43R), Plesetsk Cosmodrome, Russian Federation
- Payload
- Government/Top Secret
- International designator
- 2001-022
- Launches in 2001
- 22nd of 59
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