| Primary satellite | Secondary satellite |
| Name | FW4S | COSMOS 2251 DEB |
| Spacetrack catalog number | 7228 | 35645 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 02:28 | 2024 Dec 22 11:25 |
| Time of closest approach (UTC) | 2024 Dec 25 23:11:03.505 |
| Minimum distance | 4.717 km |
| Height difference | -2.749 km |
| Relative speed | 14.436 km/s |
| Angle between velocity vectors | 154° |
| Geographic position | 68.1°N, 13.8°W |
| Height | 831 km |
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