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Spacecraft information: VANGUARD R/B
Launch Details
| Launched | 16 March 1958 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 16 |
| COSPAR ID | 1958-002A |
| Observing |
Current orbital elements
| Inclination | 34.258° |
| Eccentricity | 0.20207 |
| RA ascending node | 16.502 hr |
| Argument perigee | 38.792° |
| Mean anomaly | 334.168° |
| Orbital period | 137.198 min |
| Epoch of osculation | 04 Mar 2026, 13:56 |
Derived Quantities
| Min Altitude | 660.1 km |
| Mean Altitude | 2440.7 km |
| Peak Altitude | 4221.2 km |
Orbital History
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