| Primary satellite | Secondary satellite |
| Name | UNISAT 6 | Cosmos 2221 |
| Spacetrack catalog number | 40012 | 22236 |
| Radar cross section | medium | large |
| Epoch of two-line elements (UTC) | 2024 Dec 22 20:56 | 2024 Dec 22 21:38 |
| Time of closest approach (UTC) | 2024 Dec 27 16:15:14.576 |
| Minimum distance | 4.539 km |
| Height difference | -4.234 km |
| Relative speed | 15.139 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 75.2°N, 146.7°E |
| Height | 607 km |
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