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Spacecraft information: USA 21
Launch Details
| Launched | 11 February 1987 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 17506 |
| COSPAR ID | 1987-015A |
| Observing |
Current orbital elements
| Inclination | 62.967° |
| Eccentricity | 0.72756 |
| RA ascending node | 18.211 hr |
| Argument perigee | 278.063° |
| Mean anomaly | 12.451° |
| Orbital period | 714.702 min |
| Epoch of osculation | 14 Feb 2026, 03:28 |
Derived Quantities
| Min Altitude | 843.1 km |
| Mean Altitude | 20108.5 km |
| Peak Altitude | 39374.0 km |
Launched alongside
TITAN 34B R/BOrbital History
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