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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 | 0.20178 |
| RA ascending node | 14.840 hr |
| Argument perigee | 240.991° |
| Mean anomaly | 97.382° |
| Orbital period | 137.195 min |
| Epoch of osculation | 15 Jul 2026, 17:07 |
Derived Quantities
| Min Altitude | 662.6 km |
| Mean Altitude | 2440.5 km |
| Peak Altitude | 4218.5 km |
Orbital History
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