Flight
- Date and time (UTC)
- August 8, 1968, 20:12
- Launch designation
- 1968-066
- Mission
- AD-C
- Flight name
- Explorer 39/40
- Vehicle flight ID
- S165C
- Year
- Launches in 1968
Orbit and payload
- Initial apogee
- 2,554 km
- Payload mass to orbit
- 0.086 t
- Payloads
- 2
- GCAT launch code
- OS
Payloads
| Payload | Designation | Owner | Mission type | Mass | Fate |
|---|---|---|---|---|---|
| Explorer 39 | 1968-066ANORAD 3337 | NASA Langley Research Center | Space science | 16 kg | Reentered (orbital decay) · Jun 22, 1981 |
| Explorer 40 | 1968-066BNORAD 3338 | NASA Langley Research Center | Space science | 70 kg | In orbit |
Source: GCAT launch list and payload catalogs, Jonathan C. McDowell (CC BY 4.0). Orbit values are the initial orbit reported for the launch.