Soyuz U | Yantar-4K2 1

Operated by Soviet Space Program, the Government/Top Secret mission Soyuz U | Yantar-4K2 1 delivered its payload into LEO.

Launch time
Status
SUCCESS
Operator
Soviet Space Program
Mission type
Government/Top Secret
Rocket
Soyuz U
Launch site
Baikonur Cosmodrome, Republic of Kazakhstan
Launch pad
31/6
Payload
—
Target orbit
LEO
Soyuz U | Yantar-4K2 1 cover image

Mission timeline

  1. 1981-08-21T10:20:00.000Z
    Liftoff
    Soyuz U roars off the pad at Baikonur Cosmodrome, Republic of Kazakhstan.
  2. Max-Q
    The vehicle reaches Max Q, the highest aerodynamic load of the flight.
  3. Main engine cutoff (MECO)
    MECO — first-stage propulsion ends after a nominal burn.
  4. Stage separation
    Clean stage separation confirmed.
  5. Second-stage ignition
    The upper-stage engine lights up after separation.
  6. Orbit insertion
    Orbit insertion confirmed — now circling in LEO.
  7. Mission success
    All mission objectives achieved.

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