UR-500 | Proton 3a
A UR-500 rocket launched UR-500 | Proton 3a from Baikonur Cosmodrome, Republic of Kazakhstan, targeting LEO.
- Launch time
- Status
- FAILED
- Operator
- Soviet Space Program
- Mission type
- Astrophysics
- Rocket
- UR-500
- Launch site
- Baikonur Cosmodrome, Republic of Kazakhstan
- Launch pad
- 81/23 (81L)
- Payload
- —
- Target orbit
- LEO

Mission timeline
- 1966-03-24T14:39:00.000ZUR-500 clears the pad at Baikonur Cosmodrome, Republic of Kazakhstan and begins its ascent.
- UR-500 pushes through the region of maximum dynamic pressure.
- The mission fails to reach its objectives.