Explorer S-66 (Beacon Explorer-A / BE-A), a NASA ionospheric research satellite with radio beacons and laser reflectors. Thor-Delta B from Cape Canaveral LC-17A failed on 19 March 1964 when the third stage malfunctioned; the vehicle fell into the South Atlantic and never reached orbit.
- Outcome
- Failure
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- Did not reach orbit
- Flight
- 9th
- of 9 Thor Delta B flights
- Date and time
- 19 March 1964, 11:13 UTC
- Rocket
- Thor Delta B
- Builder
- McDonnell Douglas
- Launch site
- Space Launch Complex 17A, Cape Canaveral SFS, FL, USA
- Payload
- Earth Science
- Launches in 1964
- 15th of 100