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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 | 26.066° |
| Eccentricity | 0.70726 |
| RA ascending node | 23.398 hr |
| Argument perigee | 193.694° |
| Mean anomaly | 140.283° |
| Orbital period | 635.564 min |
| Epoch of osculation | 21 May 2026, 05:46 |
Derived Quantities
| Min Altitude | 797.4 km |
| Mean Altitude | 18115.9 km |
| Peak Altitude | 35434.3 km |
Orbital History
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