| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | deb Delta 139 |
| Spacetrack catalog number | 35789 | 13579 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 14:34 | 2024 Dec 22 21:00 |
| Time of closest approach (UTC) | 2024 Dec 24 19:40:51.561 |
| Minimum distance | 2.782 km |
| Height difference | 2.302 km |
| Relative speed | 13.214 km/s |
| Angle between velocity vectors | 125° |
| Geographic position | 74.1°S, 94.2°E |
| Height | 820 km |
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