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Spacecraft information: SPACENET 4 R/B
Launch Details
| Launched | 12 April 1991 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 21229 |
| COSPAR ID | 1991-028C |
| Alternative names |
PAM-D |
| Observing |
Current orbital elements
| Inclination | 22.650° |
| Eccentricity | 0.69106 |
| RA ascending node | 22.183 hr |
| Argument perigee | 143.679° |
| Mean anomaly | 1.083° |
| Orbital period | 655.443 min |
| Epoch of osculation | 12 Dec 2025, 07:46 |
Derived Quantities
| Min Altitude | 1350.9 km |
| Mean Altitude | 18623.8 km |
| Peak Altitude | 35896.8 km |
Orbital History
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