| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | YUNHAI 1-04 |
| Spacetrack catalog number | 34913 | 58073 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 23 07:23 | 2024 Dec 23 03:57 |
| Time of closest approach (UTC) | 2024 Dec 25 03:01:51.051 |
| Minimum distance | 1.811 km |
| Height difference | 1.809 km |
| Relative speed | 14.883 km/s |
| Angle between velocity vectors | 171° |
| Geographic position | 33.1°N, 121.7°W |
| Height | 783 km |
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