| Primary satellite | Secondary satellite |
| Name | USA 238 | COSMOS 2251 DEB |
| Spacetrack catalog number | 38758 | 34432 |
| Radar cross section | | small |
| Epoch of two-line elements (UTC) | 2021 Apr 11 19:40 | 2021 Apr 12 17:54 |
| Time of closest approach (UTC) | 2021 Mar 08 17:45:08.417 |
| Minimum distance | 33.711 km |
| Height difference | 7.925 km |
| Relative speed | 13.629 km/s |
| Angle between velocity vectors | 136° |
| Geographic position | 14.3°N, 12.9°E |
| Height | 999 km |
|