| Primary satellite | Secondary satellite |
| Name | SL-4 R/B | COSMOS 2251 DEB |
| Spacetrack catalog number | 39679 | 35795 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2022 Jun 24 19:01 | 2022 Jun 24 05:56 |
| Time of closest approach (UTC) | 2022 May 25 23:47:45.549 |
| Minimum distance | 434.653 km |
| Height difference | 2.136 km |
| Relative speed | 3.686 km/s |
| Angle between velocity vectors | 28° |
| Geographic position | 33.7°N, 148.1°W |
| Height | 653 km |
|