| Primary satellite | Secondary satellite |
| Name | YUNHAI 1 | COSMOS 2251 DEB |
| Spacetrack catalog number | 41857 | 38068 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 11:00 | 2024 Dec 20 02:43 |
| Time of closest approach (UTC) | 2024 Dec 25 16:08:41.301 |
| Minimum distance | 4.363 km |
| Height difference | 4.050 km |
| Relative speed | 13.556 km/s |
| Angle between velocity vectors | 131° |
| Geographic position | 73.9°S, 177.0°E |
| Height | 810 km |
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