| Primary satellite | Secondary satellite |
| Name | ASTEX 1 | FENGYUN 1C DEB |
| Spacetrack catalog number | 5560 | 35105 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 14:21 | 2024 Dec 18 03:42 |
| Time of closest approach (UTC) | 2024 Dec 25 00:47:07.071 |
| Minimum distance | 3.368 km |
| Height difference | -0.996 km |
| Relative speed | 6.594 km/s |
| Angle between velocity vectors | 52° |
| Geographic position | 80.5°N, 100.0°E |
| Height | 728 km |
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