Spacecraft information: VANGUARD 3
| Launched | 17 September 1959 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 20 |
| COSPAR ID | 1959-007A |
| Observing |
Current orbital elements
| Inclination | 33.342° |
| Eccentricity | 0.16377 |
| RA ascending node | 17.839 hr |
| Argument perigee | 52.627° |
| Mean anomaly | 321.253° |
| Orbital period | 123.928 min |
| Epoch of osculation | 17 Jun 2026, 00:11 |
Derived Quantities
| Min Altitude | 514.5 km |
| Mean Altitude | 1862.9 km |
| Peak Altitude | 3211.3 km |
Orbital History
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