| Primary satellite | Secondary satellite |
| Name | LEGION 4 | COSMOS 2251 DEB |
| Spacetrack catalog number | 60453 | 34139 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 23:56 | 2024 Dec 22 15:54 |
| Time of closest approach (UTC) | 2024 Dec 24 20:46:29.356 |
| Minimum distance | 2.730 km |
| Height difference | -1.069 km |
| Relative speed | 8.841 km/s |
| Angle between velocity vectors | 72° |
| Geographic position | 45.0°N, 174.2°E |
| Height | 702 km |
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