Proton | Salyut-3a
Operated by Soviet Space Program, the Human Exploration mission Proton | Salyut-3a delivered its payload into LEO.
- Launch time
- Status
- SUCCESS
- Operator
- Soviet Space Program
- Mission type
- Human Exploration
- Rocket
- Proton
- Launch site
- Baikonur Cosmodrome, Republic of Kazakhstan
- Launch pad
- 81/23 (81L)
- Payload
- —
- Target orbit
- LEO

Mission timeline
- 1973-05-11T00:20:00.000ZProton roars off the pad at Baikonur Cosmodrome, Republic of Kazakhstan.
- The vehicle reaches Max Q, the highest aerodynamic load of the flight.
- Orbit insertion confirmed — now circling in LEO.
- All mission objectives achieved.