| Primary satellite | Secondary satellite |
| Name | Cosmos 1727 Rocket | Kosmos-1244 |
| Spacetrack catalog number | 16511 | 12297 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2026 Jan 13 13:12 | 2026 Jan 13 13:11 |
| Time of closest approach (UTC) | 2025 Dec 20 13:01:40.974 |
| Minimum distance | 5.149 km |
| Height difference | -3.964 km |
| Relative speed | 13.858 km/s |
| Angle between velocity vectors | 141° |
| Geographic position | 68.7°N, 48.6°W |
| Height | 1000 km |
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