| Primary satellite | Secondary satellite |
| Name | Cosmos 2221 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 22237 | 29865 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Apr 28 02:46 | 2025 Apr 28 04:32 |
| Time of closest approach (UTC) | 2024 Jul 19 08:40:08.718 |
| Minimum distance | 41.281 km |
| Height difference | 33.823 km |
| Relative speed | 15.042 km/s |
| Angle between velocity vectors | 177° |
| Geographic position | 50.6°N, 28.5°W |
| Height | 646 km |
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