| Primary satellite | Secondary satellite |
| Name | FENGYUN 1C DEB | Cosmos 1023 |
| Spacetrack catalog number | 41826 | 10961 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2025 Nov 17 15:25 | 2025 Nov 17 20:12 |
| Time of closest approach (UTC) | 2025 Oct 15 14:34:49.077 |
| Minimum distance | 18.382 km |
| Height difference | -1.742 km |
| Relative speed | 14.917 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 17.2°N, 109.0°E |
| Height | 778 km |
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