| Primary satellite | Secondary satellite |
| Name | Cosmos 1850 Rocket | Cosmos 858 Rocket |
| Spacetrack catalog number | 18096 | 9444 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2024 Dec 23 01:57 | 2024 Dec 23 03:47 |
| Time of closest approach (UTC) | 2024 Dec 25 22:53:59.919 |
| Minimum distance | 1.711 km |
| Height difference | 0.529 km |
| Relative speed | 7.518 km/s |
| Angle between velocity vectors | 60° |
| Geographic position | 71.6°N, 101.2°W |
| Height | 766 km |
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