| Primary satellite | Secondary satellite |
| Name | OBJECT F | deb Kosmos-858 |
| Spacetrack catalog number | 44884 | 18504 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 08:45 | 2024 Dec 22 15:19 |
| Time of closest approach (UTC) | 2024 Dec 29 00:18:24.484 |
| Minimum distance | 4.122 km |
| Height difference | -0.095 km |
| Relative speed | 12.318 km/s |
| Angle between velocity vectors | 109° |
| Geographic position | 73.8°N, 170.8°W |
| Height | 597 km |
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