| Primary satellite | Secondary satellite |
| Name | Iridium Sim1 | Cosmos 1953 Rocket |
| Spacetrack catalog number | 24925 | 19211 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2024 Dec 23 03:46 | 2024 Dec 23 11:43 |
| Time of closest approach (UTC) | 2024 Dec 26 21:00:00.298 |
| Minimum distance | 3.445 km |
| Height difference | -1.521 km |
| Relative speed | 8.171 km/s |
| Angle between velocity vectors | 65° |
| Geographic position | 82.5°N, 166.9°W |
| Height | 617 km |
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