| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | IRIDIUM 153 |
| Spacetrack catalog number | 35459 | 43078 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 20 16:06 | 2024 Dec 22 21:22 |
| Time of closest approach (UTC) | 2024 Dec 28 17:30:13.740 |
| Minimum distance | 4.224 km |
| Height difference | 3.637 km |
| Relative speed | 5.103 km/s |
| Angle between velocity vectors | 40° |
| Geographic position | 68.9°S, 16.6°W |
| Height | 802 km |
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