| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | CSL-04 DEB |
| Spacetrack catalog number | 35789 | 26125 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 14:34 | 2024 Dec 22 18:48 |
| Time of closest approach (UTC) | 2024 Dec 29 22:48:49.222 |
| Minimum distance | 3.441 km |
| Height difference | -2.684 km |
| Relative speed | 14.914 km/s |
| Angle between velocity vectors | 171° |
| Geographic position | 41.9°N, 73.3°W |
| Height | 789 km |
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