| Primary satellite | Secondary satellite |
| Name | SJ-9B | COSMOS 2251 DEB |
| Spacetrack catalog number | 38861 | 34429 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 11:38 | 2024 Dec 22 14:00 |
| Time of closest approach (UTC) | 2024 Dec 27 20:24:24.494 |
| Minimum distance | 2.471 km |
| Height difference | 2.340 km |
| Relative speed | 15.013 km/s |
| Angle between velocity vectors | 170° |
| Geographic position | 34.7°S, 39.4°W |
| Height | 625 km |
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