| Primary satellite | Secondary satellite |
| Name | USA 81 | SENTINEL 2A |
| Spacetrack catalog number | 21949 | 40697 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2024 Dec 22 15:14 | 2024 Dec 23 04:38 |
| Time of closest approach (UTC) | 2024 Dec 23 09:11:11.674 |
| Minimum distance | 3.379 km |
| Height difference | 3.374 km |
| Relative speed | 5.798 km/s |
| Angle between velocity vectors | 46° |
| Geographic position | 72.3°S, 8.4°W |
| Height | 813 km |
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