| Primary satellite | Secondary satellite |
| Name | Kosmos-449 | A-11 Canister half |
| Spacetrack catalog number | 5552 | 51 |
| Radar cross section | medium | medium |
| Epoch of two-line elements (UTC) | 2024 Dec 22 21:13 | 2024 Dec 22 20:38 |
| Time of closest approach (UTC) | 2024 Dec 28 12:48:02.460 |
| Minimum distance | 4.030 km |
| Height difference | 0.826 km |
| Relative speed | 10.630 km/s |
| Angle between velocity vectors | 96° |
| Geographic position | 40.1°N, 28.4°E |
| Height | 1519 km |
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