| Primary satellite | Secondary satellite |
| Name | IRIDIUM 100 | COSMOS 2251 DEB |
| Spacetrack catalog number | 42956 | 35445 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 02:38 | 2024 Dec 21 16:30 |
| Time of closest approach (UTC) | 2024 Dec 25 02:23:48.218 |
| Minimum distance | 0.895 km |
| Height difference | 0.814 km |
| Relative speed | 1.623 km/s |
| Angle between velocity vectors | 13° |
| Geographic position | 8.4°S, 59.1°W |
| Height | 783 km |
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