| Primary satellite | Secondary satellite |
| Name | deb Chang Zheng 4 | COSMOS 2251 DEB |
| Spacetrack catalog number | 20877 | 35440 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 14:01 | 2024 Dec 19 06:16 |
| Time of closest approach (UTC) | 2024 Dec 25 19:52:49.661 |
| Minimum distance | 0.335 km |
| Height difference | -0.304 km |
| Relative speed | 14.627 km/s |
| Angle between velocity vectors | 151° |
| Geographic position | 70.0°N, 173.6°W |
| Height | 648 km |
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