| Primary satellite | Secondary satellite |
| Name | Cosmos 2221 | UNISAT 6 |
| Spacetrack catalog number | 22236 | 40012 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2024 Dec 23 12:06 | 2024 Dec 23 09:53 |
| Time of closest approach (UTC) | 2024 Dec 27 16:15:14.313 |
| Minimum distance | 4.504 km |
| Height difference | 4.216 km |
| Relative speed | 15.139 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 75.2°N, 146.6°E |
| Height | 603 km |
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