| Primary satellite | Secondary satellite |
| Name | deb Delta 139 | COSMOS 2251 DEB |
| Spacetrack catalog number | 12227 | 36047 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 06:51 | 2024 Dec 20 21:52 |
| Time of closest approach (UTC) | 2024 Dec 28 14:15:46.771 |
| Minimum distance | 2.696 km |
| Height difference | -2.485 km |
| Relative speed | 15.036 km/s |
| Angle between velocity vectors | 173° |
| Geographic position | 5.8°N, 176.0°E |
| Height | 637 km |
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