| Primary satellite | Secondary satellite |
| Name | IRIDIUM 138 | DMSP 5D-2 F13 DEB |
| Spacetrack catalog number | 43071 | 42278 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 20:13 | 2024 Dec 21 12:24 |
| Time of closest approach (UTC) | 2024 Dec 26 15:46:04.114 |
| Minimum distance | 2.033 km |
| Height difference | -0.008 km |
| Relative speed | 14.829 km/s |
| Angle between velocity vectors | 169° |
| Geographic position | 60.1°S, 40.5°E |
| Height | 803 km |
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