Spacecraft information: OPS 7350
| Launched | 15 March 1981 |
| Flight ended | – |
| Status | Non-operational |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 12339 |
| COSPAR ID | 1981-025A |
| Alternative names |
DSP 9 |
| Observing |
Current orbital elements
| Inclination | 8.014° |
| Eccentricity | 0.00187 |
| RA ascending node | 20.318 hr |
| Argument perigee | 290.250° |
| Mean anomaly | 273.746° |
| Orbital period | 1457.051 min |
| Epoch of osculation | 26 Jul 2026, 12:53 |
Derived Quantities
| Min Altitude | 36123.2 km |
| Mean Altitude | 36202.9 km |
| Peak Altitude | 36282.6 km |
Orbital History
Drag the graphs below left or right to change the time range, or use your scroll wheel to zoom in or out.