| Primary satellite | Secondary satellite |
| Name | Iridium Sim2 | Cosmos 1328 Rocket |
| Spacetrack catalog number | 24926 | 12988 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2024 Dec 23 03:47 | 2024 Dec 23 02:24 |
| Time of closest approach (UTC) | 2024 Dec 24 08:34:53.070 |
| Minimum distance | 4.327 km |
| Height difference | 2.230 km |
| Relative speed | 14.706 km/s |
| Angle between velocity vectors | 155° |
| Geographic position | 63.7°S, 11.8°W |
| Height | 638 km |
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