| Primary satellite | Secondary satellite |
| Name | Iridium 4 Rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 24797 | 38189 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 20:21 | 2021 Jan 16 04:57 |
| Time of closest approach (UTC) | 2020 Dec 02 15:20:21.242 |
| Minimum distance | 284.259 km |
| Height difference | 7.073 km |
| Relative speed | 14.923 km/s |
| Angle between velocity vectors | 159° |
| Geographic position | 33.7°N, 49.8°W |
| Height | 607 km |
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