| Primary satellite | Secondary satellite |
| Name | Cosmos 2221 | ANTELSAT |
| Spacetrack catalog number | 22236 | 40034 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2024 Dec 23 12:06 | 2024 Dec 23 12:23 |
| Time of closest approach (UTC) | 2024 Dec 26 05:09:44.831 |
| Minimum distance | 3.257 km |
| Height difference | 1.135 km |
| Relative speed | 15.160 km/s |
| Angle between velocity vectors | 180° |
| Geographic position | 14.3°N, 16.3°W |
| Height | 583 km |
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