| Primary satellite | Secondary satellite |
| Name | FENGYUN 1C DEB | QIANFAN-21 |
| Spacetrack catalog number | 30959 | 61554 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 20 11:11 | 2024 Dec 23 03:55 |
| Time of closest approach (UTC) | 2024 Dec 28 18:32:58.592 |
| Minimum distance | 4.156 km |
| Height difference | 2.708 km |
| Relative speed | 14.163 km/s |
| Angle between velocity vectors | 146° |
| Geographic position | 74.3°S, 74.5°W |
| Height | 853 km |
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