| Primary satellite | Secondary satellite |
| Name | Kosmos-1226 | Cosmos 1891 Rocket |
| Spacetrack catalog number | 12091 | 18403 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2026 Jan 13 13:47 | 2026 Jan 13 10:56 |
| Time of closest approach (UTC) | 2025 Dec 07 07:58:26.989 |
| Minimum distance | 1.518 km |
| Height difference | -0.218 km |
| Relative speed | 14.354 km/s |
| Angle between velocity vectors | 155° |
| Geographic position | 55.3°N, 119.8°E |
| Height | 1001 km |
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