A Yantar-4KS1 (Terilen) electro-optical reconnaissance satellite failed to reach orbit after a Soyuz-U upper-stage malfunction during launch from Baikonur; no Kosmos designation was assigned due to the failure.
- Outcome
- Failure
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- Did not reach orbit
- Flight
- 512th
- of 714 Soyuz U flights
- Date and time
- 9 July 1988, 13:25 UTC
- Rocket
- Soyuz U
- Builder
- Progress RSC
- Launch site
- 1/5, Baikonur Cosmodrome, Republic of Kazakhstan
- Payload
- Government/Top Secret
- Launches in 1988
- 60th of 121