| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | deb Delta 139 |
| Spacetrack catalog number | 34430 | 13570 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 01:42 | 2024 Dec 23 00:31 |
| Time of closest approach (UTC) | 2024 Dec 27 00:30:41.460 |
| Minimum distance | 3.379 km |
| Height difference | -3.160 km |
| Relative speed | 14.544 km/s |
| Angle between velocity vectors | 155° |
| Geographic position | 68.8°S, 79.0°E |
| Height | 800 km |
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