| Primary satellite | Secondary satellite |
| Name | deb Feng Yun 1B | COSMOS 2251 DEB |
| Spacetrack catalog number | 23258 | 35445 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 20 04:46 | 2024 Dec 21 16:30 |
| Time of closest approach (UTC) | 2024 Dec 25 04:24:23.675 |
| Minimum distance | 3.771 km |
| Height difference | -3.050 km |
| Relative speed | 11.415 km/s |
| Angle between velocity vectors | 101° |
| Geographic position | 73.1°S, 22.7°W |
| Height | 856 km |
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