| Primary satellite | Secondary satellite |
| Name | IRIDIUM 138 | FENGYUN 1C DEB |
| Spacetrack catalog number | 43071 | 31341 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 20:13 | 2024 Dec 21 22:12 |
| Time of closest approach (UTC) | 2024 Dec 27 19:25:57.557 |
| Minimum distance | 1.367 km |
| Height difference | -1.280 km |
| Relative speed | 14.760 km/s |
| Angle between velocity vectors | 164° |
| Geographic position | 67.7°N, 166.4°E |
| Height | 788 km |
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