| Primary satellite | Secondary satellite |
| Name | USA 81 | Cosmos 1814 Rocket |
| Spacetrack catalog number | 21949 | 17304 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2024 Dec 22 15:14 | 2024 Dec 22 17:20 |
| Time of closest approach (UTC) | 2024 Dec 26 00:13:30.804 |
| Minimum distance | 4.933 km |
| Height difference | -2.459 km |
| Relative speed | 6.523 km/s |
| Angle between velocity vectors | 52° |
| Geographic position | 73.0°N, 89.6°E |
| Height | 796 km |
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