| Primary satellite | Secondary satellite |
| Name | Cosmos 1538 Rocket | STRAND 1 |
| Spacetrack catalog number | 14760 | 39090 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 11:37 | 2024 Dec 23 01:35 |
| Time of closest approach (UTC) | 2024 Dec 27 22:05:51.641 |
| Minimum distance | 3.985 km |
| Height difference | -2.470 km |
| Relative speed | 9.077 km/s |
| Angle between velocity vectors | 75° |
| Geographic position | 69.3°S, 85.2°W |
| Height | 804 km |
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