| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | IRIDIUM 138 |
| Spacetrack catalog number | 35031 | 43071 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 21 05:55 | 2024 Dec 22 20:13 |
| Time of closest approach (UTC) | 2024 Dec 24 09:51:03.413 |
| Minimum distance | 3.149 km |
| Height difference | 0.138 km |
| Relative speed | 1.641 km/s |
| Angle between velocity vectors | 13° |
| Geographic position | 11.8°N, 125.4°E |
| Height | 780 km |
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