| Primary satellite | Secondary satellite |
| Name | deb Feng Yun 1B | Cosmos 2251 Rocket |
| Spacetrack catalog number | 23259 | 22676 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 22 22:46 | 2024 Dec 23 00:21 |
| Time of closest approach (UTC) | 2024 Dec 29 17:37:37.306 |
| Minimum distance | 2.489 km |
| Height difference | -2.473 km |
| Relative speed | 14.866 km/s |
| Angle between velocity vectors | 170° |
| Geographic position | 40.6°N, 11.2°W |
| Height | 791 km |
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