Flight
- Date and time (UTC)
- March 17, 1958, 12:15
- Launch designation
- 1958 BET
- Mission
- Vanguard Test Satellite
- Flight name
- Vanguard I
- Vehicle flight ID
- TV-4
- Year
- Launches in 1958
Orbit and payload
- Initial apogee
- 4,329 km
- Payload mass to orbit
- 0.002 t
- Payloads
- 1
- GCAT launch code
- OS
Payloads
| Payload | Designation | Owner | Mission type | Mass | Fate |
|---|---|---|---|---|---|
| Vanguard I | 1958 BET 2NORAD 5 | Naval Research Lab | Technology | 2 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.