Kosmos 665 (US-K #3), an early Oko missile early-warning satellite on a highly elliptical Molniya-type orbit to watch for ICBM launches. Molniya-M (Blok-2BL) from Plesetsk Site 41/1 lofted the craft on 29 June 1974 during the experimental US-K development phase.
- Outcome
- Success
- Orbit
- Elliptical
- Elliptical orbit
- Payload to orbit
- 1.6 T (est.)
- Flight
- 54th
- of 272 Molniya-M 2BL flights
- Date and time
- 29 June 1974, 15:59 UTC
- Rocket
- Molniya-M 2BL
- Builder
- Progress RSC
- Launch site
- 41/1, Plesetsk Cosmodrome, Russian Federation
- Payload
- Government/Top Secret
- International designator
- 1974-050
- Launches in 1974
- 53rd of 113
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