Soyuz U | Zenit-4MT 20

Operated by Soviet Space Program, the Government/Top Secret mission Soyuz U | Zenit-4MT 20 delivered its payload into LEO.

Launch time
Status
SUCCESS
Operator
Soviet Space Program
Mission type
Government/Top Secret
Rocket
Soyuz U
Launch site
Plesetsk Cosmodrome, Russian Federation
Launch pad
41/1
Payload
—
Target orbit
LEO
Soyuz U | Zenit-4MT 20 cover image

Mission timeline

  1. 1981-01-16T12:00:00.000Z
    Liftoff
    Soyuz U lifts off from Plesetsk Cosmodrome, Russian Federation.
  2. Max-Q
    Soyuz U passes through max aerodynamic pressure (Max Q).
  3. Main engine cutoff (MECO)
    Main engine cutoff — the first stage shuts down as planned.
  4. Stage separation
    Stage separation — the first stage separates cleanly.
  5. Second-stage ignition
    Second-stage engine ignites for the next phase of flight.
  6. Orbit insertion
    Orbit insertion confirmed — the vehicle is now in LEO.
  7. Mission success
    Mission success — all objectives completed.

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