| Primary satellite | Secondary satellite |
| Name | Cosmos 1538 Rocket | IRIDIUM 33 DEB |
| Spacetrack catalog number | 14760 | 34651 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 11:37 | 2024 Dec 23 05:50 |
| Time of closest approach (UTC) | 2024 Dec 28 06:51:55.540 |
| Minimum distance | 12.292 km |
| Height difference | 1.202 km |
| Relative speed | 14.762 km/s |
| Angle between velocity vectors | 160° |
| Geographic position | 14.1°S, 90.8°W |
| Height | 758 km |
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