| Primary satellite | Secondary satellite |
| Name | deb Agena D | COSMOS 2251 DEB |
| Spacetrack catalog number | 4211 | 35045 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 19:14 | 2024 Dec 20 15:23 |
| Time of closest approach (UTC) | 2024 Dec 28 16:26:31.366 |
| Minimum distance | 3.676 km |
| Height difference | 1.686 km |
| Relative speed | 14.175 km/s |
| Angle between velocity vectors | 144° |
| Geographic position | 0.4°N, 144.2°E |
| Height | 835 km |
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