| Primary satellite | Secondary satellite |
| Name | YUNHAI 1 | COSMOS 2251 DEB |
| Spacetrack catalog number | 41857 | 33942 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2024 Dec 23 11:00 | 2024 Dec 23 01:43 |
| Time of closest approach (UTC) | 2024 Dec 29 19:39:43.708 |
| Minimum distance | 4.204 km |
| Height difference | -4.016 km |
| Relative speed | 14.875 km/s |
| Angle between velocity vectors | 171° |
| Geographic position | 37.0°N, 30.8°W |
| Height | 787 km |
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