| Primary satellite | Secondary satellite |
| Name | Cosmos 2221 Rocket | CZ-2C R/B |
| Spacetrack catalog number | 22237 | 37731 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2026 Jan 14 12:56 | 2026 Jan 14 20:03 |
| Time of closest approach (UTC) | 2025 Dec 07 19:40:04.302 |
| Minimum distance | 5.150 km |
| Height difference | -3.728 km |
| Relative speed | 15.060 km/s |
| Angle between velocity vectors | 180° |
| Geographic position | 0.5°N, 104.2°E |
| Height | 645 km |
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