| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | CSL-04 DEB |
| Spacetrack catalog number | 35605 | 26123 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 20 17:09 | 2024 Dec 22 14:18 |
| Time of closest approach (UTC) | 2024 Dec 29 08:00:11.265 |
| Minimum distance | 2.783 km |
| Height difference | 0.316 km |
| Relative speed | 3.261 km/s |
| Angle between velocity vectors | 25° |
| Geographic position | 9.0°S, 62.5°W |
| Height | 667 km |
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