Flight
- Date and time (UTC)
- February 16, 1961, 13:05
- Launch designation
- 1961 DEL
- Mission
- NASA S-56A
- Flight name
- Explorer 9
- Vehicle flight ID
- ST-4
- Year
- Launches in 1961
Orbit and payload
- Initial apogee
- 2,605 km
- Payload mass to orbit
- 0.006 t
- Payloads
- 1
- GCAT launch code
- OS
Payloads
| Payload | Designation | Owner | Mission type | Mass | Fate |
|---|---|---|---|---|---|
| Explorer 9 | 1961 DEL 1NORAD 81 | NASA Langley Research Center | Space science | 6 kg | Reentered (orbital decay) · Apr 9, 1964 |
Source: GCAT launch list and payload catalogs, Jonathan C. McDowell (CC BY 4.0). Orbit values are the initial orbit reported for the launch.