| Primary satellite | Secondary satellite |
| Name | Cosmos 2221 Rocket | CUBEBUG 2 |
| Spacetrack catalog number | 22237 | 39440 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2026 Jan 14 12:56 | 2026 Jan 14 19:11 |
| Time of closest approach (UTC) | 2025 Dec 13 00:48:26.091 |
| Minimum distance | 1.599 km |
| Height difference | -1.449 km |
| Relative speed | 15.069 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 48.5°N, 25.5°E |
| Height | 637 km |
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