| Primary satellite | Secondary satellite |
| Name | Cosmos 1091 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 11321 | 29926 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 10:22 | 2024 Dec 22 22:47 |
| Time of closest approach (UTC) | 2024 Dec 27 05:13:46.236 |
| Minimum distance | 3.133 km |
| Height difference | 2.383 km |
| Relative speed | 13.509 km/s |
| Angle between velocity vectors | 134° |
| Geographic position | 81.6°N, 83.1°E |
| Height | 974 km |
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