| Primary satellite | Secondary satellite |
| Name | FENGYUN 1C DEB | Cosmos 1263 |
| Spacetrack catalog number | 38824 | 12388 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 19 13:27 | 2024 Dec 23 05:40 |
| Time of closest approach (UTC) | 2024 Dec 26 02:57:53.201 |
| Minimum distance | 2.083 km |
| Height difference | -2.039 km |
| Relative speed | 14.914 km/s |
| Angle between velocity vectors | 175° |
| Geographic position | 28.6°N, 161.6°E |
| Height | 815 km |
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