| Primary satellite | Secondary satellite |
| Name | IRIDIUM 138 | deb Chang Zheng 4 |
| Spacetrack catalog number | 43071 | 20969 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2024 Dec 22 20:13 | 2024 Dec 22 20:46 |
| Time of closest approach (UTC) | 2024 Dec 27 20:01:48.037 |
| Minimum distance | 4.903 km |
| Height difference | -4.864 km |
| Relative speed | 14.893 km/s |
| Angle between velocity vectors | 175° |
| Geographic position | 16.5°S, 30.3°W |
| Height | 786 km |
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