| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | IRIDIUM 156 |
| Spacetrack catalog number | 34910 | 43576 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 22 20:21 | 2024 Dec 22 20:28 |
| Time of closest approach (UTC) | 2024 Dec 25 02:39:56.944 |
| Minimum distance | 3.682 km |
| Height difference | 2.176 km |
| Relative speed | 2.601 km/s |
| Angle between velocity vectors | 20° |
| Geographic position | 49.7°N, 36.4°W |
| Height | 783 km |
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