| Primary satellite | Secondary satellite |
| Name | CZ-2C R/B | COSMOS 2251 DEB |
| Spacetrack catalog number | 37766 | 34946 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Dec 14 06:15 | 2025 Dec 11 09:12 |
| Time of closest approach (UTC) | 2025 Jul 15 13:18:14.778 |
| Minimum distance | 507.059 km |
| Height difference | -28.807 km |
| Relative speed | 15.012 km/s |
| Angle between velocity vectors | 173° |
| Geographic position | 41.3°N, 144.9°E |
| Height | 697 km |
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