Spacecraft information: OPS 7869
| Launched | 22 May 1968 |
| Flight ended | – |
| Status | Non-operational |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 3266 |
| COSPAR ID | 1968-042A |
| Alternative names |
DMSP 4B F1 |
| Observing |
Current orbital elements
| Inclination | 98.561° |
| Eccentricity | 0.00525 |
| RA ascending node | 18.635 hr |
| Argument perigee | 179.213° |
| Mean anomaly | 180.914° |
| Orbital period | 101.704 min |
| Epoch of osculation | 26 Mar 2026, 10:22 |
Derived Quantities
| Min Altitude | 808.6 km |
| Mean Altitude | 846.5 km |
| Peak Altitude | 884.4 km |
Launched alongside
THOR BURNER 2 R/BOrbital History
Drag the graphs below left or right to change the time range, or use your scroll wheel to zoom in or out.