| Primary satellite | Secondary satellite |
| Name | deb Delta 139 | FENGYUN 1C DEB |
| Spacetrack catalog number | 12172 | 30443 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 00:38 | 2024 Dec 22 19:35 |
| Time of closest approach (UTC) | 2024 Dec 28 10:16:53.593 |
| Minimum distance | 2.242 km |
| Height difference | 1.028 km |
| Relative speed | 9.875 km/s |
| Angle between velocity vectors | 83° |
| Geographic position | 78.2°N, 2.6°W |
| Height | 821 km |
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