| Primary satellite | Secondary satellite |
| Name | USA 81 | YUNHAI-1 03 |
| Spacetrack catalog number | 21949 | 53877 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2024 Dec 22 15:14 | 2024 Dec 22 22:03 |
| Time of closest approach (UTC) | 2024 Dec 28 14:19:34.672 |
| Minimum distance | 3.400 km |
| Height difference | -3.252 km |
| Relative speed | 3.638 km/s |
| Angle between velocity vectors | 28° |
| Geographic position | 61.2°N, 118.5°W |
| Height | 795 km |
|