Soyuz U | Yantar-4KS1 15

The Government/Top Secret flight Soyuz U | Yantar-4KS1 15 departed Baikonur Cosmodrome, Republic of Kazakhstan atop a Soyuz U, bound for 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
1/5
Payload
—
Target orbit
LEO
Soyuz U | Yantar-4KS1 15 cover image

Mission timeline

  1. 1990-12-21T06:20:11.000Z
    Liftoff
    Liftoff confirmed — Soyuz U is airborne.
  2. Max-Q
    Max Q — Soyuz U endures peak structural stress during ascent.
  3. Main engine cutoff (MECO)
    First-stage main engine cutoff (MECO) confirmed.
  4. Stage separation
    The spent first stage separates from the upper stage.
  5. Second-stage ignition
    Upper stage ignites, continuing the journey toward orbit.
  6. Orbit insertion
    The mission reaches LEO, successfully entering orbit.
  7. Mission success
    The mission concludes successfully.

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