| Official name | VANGUARD 1 |
| Alternative name | Vanguard 1 |
| Cospar ID | 1958-002B |
| Norad ID | 5 |
| Launch date | 1958-03-17 |
| Launch site | AFETR |
| RCS size | SMALL |
| Decay date | ON ORBIT |
| Period (min) | 132.68 |
| Inclination (deg) | 34.25 |
| Perigee (km) | 652 |
| Apogee (km) | 3826 |
| Eccentricity | 0.708798570790531 |
| Mean motion (revs. per day) | 10.8531805848658 |
| Semi-Major axis (km) | 8617.135 |
| Raan (deg) | 177.7679 |
| Arg of perigee (deg) | 256.8393 |
| Shape | Sphere |
| Mass (kg) | 1.46 |
| Diameter (m) | 0.16 |
| Span (m^2) | 0.16 |
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