| Primary satellite | Secondary satellite |
| Name | Cosmos 1048 | USA 81 |
| Spacetrack catalog number | 11111 | 21949 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2024 Dec 23 02:57 | 2024 Dec 23 02:58 |
| Time of closest approach (UTC) | 2024 Dec 27 23:47:32.428 |
| Minimum distance | 4.647 km |
| Height difference | 0.394 km |
| Relative speed | 13.962 km/s |
| Angle between velocity vectors | 139° |
| Geographic position | 58.1°S, 117.5°E |
| Height | 808 km |
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