| Primary satellite | Secondary satellite |
| Name | FENGYUN 1C DEB | deb Kosmos-1275 |
| Spacetrack catalog number | 31087 | 19025 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 12:50 | 2024 Dec 23 00:19 |
| Time of closest approach (UTC) | 2024 Dec 25 01:35:14.097 |
| Minimum distance | 4.836 km |
| Height difference | -2.235 km |
| Relative speed | 14.816 km/s |
| Angle between velocity vectors | 174° |
| Geographic position | 79.3°N, 133.6°E |
| Height | 826 km |
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