| Primary satellite | Secondary satellite |
| Name | Cosmos 1891 Rocket | CZ-6A DEB |
| Spacetrack catalog number | 18403 | 56609 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 02:58 | 2024 Dec 22 21:37 |
| Time of closest approach (UTC) | 2024 Dec 28 11:34:50.084 |
| Minimum distance | 3.337 km |
| Height difference | -3.190 km |
| Relative speed | 13.590 km/s |
| Angle between velocity vectors | 137° |
| Geographic position | 81.2°S, 163.3°E |
| Height | 1039 km |
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