| Primary satellite | Secondary satellite |
| Name | STRAND 1 | Cosmos 858 |
| Spacetrack catalog number | 39090 | 9443 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Sep 08 19:29 | 2024 Sep 08 18:45 |
| Time of closest approach (UTC) | 2024 Apr 25 04:36:28.930 |
| Minimum distance | 779.330 km |
| Height difference | 1.454 km |
| Relative speed | 14.581 km/s |
| Angle between velocity vectors | 154° |
| Geographic position | 80.1°N, 34.3°W |
| Height | 779 km |
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