Mariner 8 (Mariner H), a NASA Mars orbiter that failed when its Atlas-Centaur Centaur upper stage tumbled after ignition from Cape Canaveral, causing the stack to reenter and fall into the Atlantic.
- Outcome
- Failure
- Orbit
- Mars
- Payload to orbit
- Did not reach orbit
- Flight
- 11th
- of 17 Atlas SLV-3C Centaur flights
- Date and time
- 9 May 1971, 01:11 UTC
- Rocket
- Atlas SLV-3C Centaur
- Builder
- Convair
- Launch site
- Launch Complex 36A, Cape Canaveral SFS, FL, USA
- Payload
- Robotic Exploration
- Launches in 1971
- 45th of 133