| Primary satellite | Secondary satellite |
| Name | CZ-4C R/B | COSMOS 2251 DEB |
| Spacetrack catalog number | 54701 | 34815 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 18:02 | 2024 Dec 22 01:11 |
| Time of closest approach (UTC) | 2024 Dec 25 13:28:24.768 |
| Minimum distance | 1.940 km |
| Height difference | 1.583 km |
| Relative speed | 8.924 km/s |
| Angle between velocity vectors | 73° |
| Geographic position | 58.9°S, 121.6°E |
| Height | 703 km |
|