Flight
- Date and time (UTC)
- February 17, 1959, 15:55
- Launch designation
- 1959 ALP
- Mission
- Cloud cover satellite
- Flight name
- Vanguard II
- Vehicle flight ID
- SLV-4
- Year
- Launches in 1959
Orbit and payload
- Initial apogee
- 3,687 km
- Payload mass to orbit
- 0.010 t
- Payloads
- 1
- GCAT launch code
- OS
Payloads
| Payload | Designation | Owner | Mission type | Mass | Fate |
|---|---|---|---|---|---|
| Vanguard II | 1959 ALP 1NORAD 11 | NASA Beltsville Space Center | Optical imaging | 10 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.