| Primary satellite | Secondary satellite |
| Name | YUNHAI 1-04 | COSMOS 2251 DEB |
| Spacetrack catalog number | 58073 | 34913 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 08:59 | 2024 Dec 23 07:23 |
| Time of closest approach (UTC) | 2024 Dec 25 03:01:51.048 |
| Minimum distance | 1.817 km |
| Height difference | -1.814 km |
| Relative speed | 14.883 km/s |
| Angle between velocity vectors | 171° |
| Geographic position | 33.1°N, 121.7°W |
| Height | 785 km |
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