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Spacecraft information: NATO 4A R/B
Launch Details
| Launched | 7 January 1991 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 21049 |
| COSPAR ID | 1991-001C |
| Alternative names |
PAM-D |
| Observing |
Current orbital elements
| Inclination | 26.023° |
| Eccentricity | 0.70718 |
| RA ascending node | 22.099 hr |
| Argument perigee | 226.637° |
| Mean anomaly | 79.239° |
| Orbital period | 635.554 min |
| Epoch of osculation | 20 Jul 2026, 15:11 |
Derived Quantities
| Min Altitude | 799.2 km |
| Mean Altitude | 18115.6 km |
| Peak Altitude | 35432.0 km |
Orbital History
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