| Primary satellite | Secondary satellite |
| Name | Cosmos 2251 Rocket | USA 81 |
| Spacetrack catalog number | 22676 | 21949 |
| Radar cross section | large | |
| Epoch of two-line elements (UTC) | 2021 Jan 25 11:02 | 2020 Nov 30 17:25 |
| Time of closest approach (UTC) | 2020 Dec 02 00:45:40.840 |
| Minimum distance | 25.659 km |
| Height difference | -1.219 km |
| Relative speed | 13.284 km/s |
| Angle between velocity vectors | 126° |
| Geographic position | 65.4°S, 91.0°W |
| Height | 816 km |
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