| Primary satellite | Secondary satellite |
| Name | Cosmos 1844 | COSMOS 2406 |
| Spacetrack catalog number | 17973 | 28352 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2025 Jan 18 20:29 | 2025 Jan 18 16:49 |
| Time of closest approach (UTC) | 2024 Dec 09 17:36:12.017 |
| Minimum distance | 131.520 km |
| Height difference | 0.355 km |
| Relative speed | 10.388 km/s |
| Angle between velocity vectors | 89° |
| Geographic position | 63.4°S, 154.2°E |
| Height | 869 km |
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