| Primary satellite | Secondary satellite |
| Name | FENGYUN 1C DEB | Sylda 4400 |
| Spacetrack catalog number | 29812 | 15680 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 23 02:06 | 2024 Dec 23 04:33 |
| Time of closest approach (UTC) | 2024 Dec 23 15:04:27.913 |
| Minimum distance | 21.215 km |
| Height difference | -0.999 km |
| Relative speed | 10.764 km/s |
| Angle between velocity vectors | 93° |
| Geographic position | 4.1°S, 107.4°W |
| Height | 929 km |
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