| Primary satellite | Secondary satellite |
| Name | IRIDIUM 138 | deb Chang Zheng 4 |
| Spacetrack catalog number | 43071 | 20974 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 20:13 | 2024 Dec 22 16:44 |
| Time of closest approach (UTC) | 2024 Dec 27 16:03:04.999 |
| Minimum distance | 3.726 km |
| Height difference | -1.706 km |
| Relative speed | 14.880 km/s |
| Angle between velocity vectors | 170° |
| Geographic position | 60.8°N, 145.0°W |
| Height | 787 km |
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