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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 | 34.269° |
| Eccentricity | 0.20193 |
| RA ascending node | 7.733 hr |
| Argument perigee | 230.893° |
| Mean anomaly | 109.428° |
| Orbital period | 137.197 min |
| Epoch of osculation | 19 Apr 2026, 01:31 |
Derived Quantities
| Min Altitude | 661.3 km |
| Mean Altitude | 2440.6 km |
| Peak Altitude | 4219.9 km |
Orbital History
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