| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | deb Delta 139 |
| Spacetrack catalog number | 34022 | 14914 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 00:37 | 2024 Dec 23 01:24 |
| Time of closest approach (UTC) | 2024 Dec 26 20:46:35.485 |
| Minimum distance | 2.748 km |
| Height difference | -2.543 km |
| Relative speed | 14.851 km/s |
| Angle between velocity vectors | 170° |
| Geographic position | 39.5°S, 17.0°W |
| Height | 789 km |
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