| Primary satellite | Secondary satellite |
| Name | Cosmos 1818 | IRIDIUM 173 |
| Spacetrack catalog number | 17369 | 43925 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2024 Dec 03 11:00 | 2024 Dec 02 23:14 |
| Time of closest approach (UTC) | 2024 Nov 13 04:40:57.124 |
| Minimum distance | 133.278 km |
| Height difference | 0.097 km |
| Relative speed | 14.270 km/s |
| Angle between velocity vectors | 146° |
| Geographic position | 33.3°S, 65.6°W |
| Height | 790 km |
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