OV1-4 |
USA |
| Designation | 02121 / 66025A |
| Launch date | 30 Mar 1966 - 09:20:12 UT |
| Launch site | Va, ABRES-B3 |
| Launch vehicle | Atlas-D OV1 (#72D) |
| Mission | Radiation experiments |
| Earth orbit: | |
| Perigee/Apogee | 879 / 1011 km |
| Inclination | 144.53° |
| Period | 104 min |
| Mass at launch | 87,6 kg |