| Primary satellite | Secondary satellite |
| Name | HEAD-3A | COSMOS 2251 DEB |
| Spacetrack catalog number | 57626 | 36058 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 08:54 | 2024 Dec 17 07:14 |
| Time of closest approach (UTC) | 2024 Dec 26 14:30:36.576 |
| Minimum distance | 3.893 km |
| Height difference | 0.821 km |
| Relative speed | 9.609 km/s |
| Angle between velocity vectors | 79° |
| Geographic position | 43.9°N, 167.8°W |
| Height | 700 km |
|