| Primary satellite | Secondary satellite |
| Name | IRIDIUM 100 | COSMOS 2251 DEB |
| Spacetrack catalog number | 42956 | 34018 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 02:38 | 2024 Dec 22 09:10 |
| Time of closest approach (UTC) | 2024 Dec 23 21:32:50.427 |
| Minimum distance | 0.595 km |
| Height difference | -0.528 km |
| Relative speed | 9.654 km/s |
| Angle between velocity vectors | 80° |
| Geographic position | 73.9°N, 2.2°E |
| Height | 789 km |
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