| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | YUNHAI 2 1 |
| Spacetrack catalog number | 35959 | 43909 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 22 15:36 | 2024 Dec 23 11:26 |
| Time of closest approach (UTC) | 2024 Dec 25 03:18:18.444 |
| Minimum distance | 2.413 km |
| Height difference | 0.250 km |
| Relative speed | 7.583 km/s |
| Angle between velocity vectors | 61° |
| Geographic position | 50.1°S, 66.4°W |
| Height | 813 km |
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