Soyuz U | Resurs-F1 17F40 104L 4
A Soyuz U rocket launched Soyuz U | Resurs-F1 17F40 104L 4 from Plesetsk Cosmodrome, Russian Federation, targeting SSO.
- Launch time
- Status
- SUCCESS
- Operator
- Soviet Space Program
- Mission type
- Earth Science
- Rocket
- Soyuz U
- Launch site
- Plesetsk Cosmodrome, Russian Federation
- Launch pad
- 43/4 (43R)
- Payload
- —
- Target orbit
- SSO

Mission timeline
- 1987-05-21T07:44:59.000ZLiftoff confirmed — Soyuz U is airborne.
- Max Q — Soyuz U endures peak structural stress during ascent.
- First-stage main engine cutoff (MECO) confirmed.
- The spent first stage separates from the upper stage.
- Upper stage ignites, continuing the journey toward orbit.
- The mission reaches SSO, successfully entering orbit.
- The mission concludes successfully.