| Primary satellite | Secondary satellite |
| Name | FENGYUN 1C DEB | Iridium Sim1 |
| Spacetrack catalog number | 35234 | 24925 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 20 01:06 | 2024 Dec 23 03:46 |
| Time of closest approach (UTC) | 2024 Dec 24 03:28:42.874 |
| Minimum distance | 1.404 km |
| Height difference | -0.423 km |
| Relative speed | 15.062 km/s |
| Angle between velocity vectors | 171° |
| Geographic position | 61.5°S, 102.4°W |
| Height | 639 km |
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