| Primary satellite | Secondary satellite |
| Name | deb Delta 139 | FENGYUN 1C DEB |
| Spacetrack catalog number | 12172 | 30492 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 00:38 | 2024 Dec 22 12:32 |
| Time of closest approach (UTC) | 2024 Dec 29 21:51:27.960 |
| Minimum distance | 2.840 km |
| Height difference | 1.243 km |
| Relative speed | 14.384 km/s |
| Angle between velocity vectors | 152° |
| Geographic position | 40.1°N, 143.5°E |
| Height | 844 km |
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