| Primary satellite | Secondary satellite |
| Name | Cosmos 1891 Rocket | deb Kosmos-1275 |
| Spacetrack catalog number | 18403 | 13073 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 02:58 | 2024 Dec 23 10:25 |
| Time of closest approach (UTC) | 2024 Dec 26 16:04:43.140 |
| Minimum distance | 3.143 km |
| Height difference | -2.940 km |
| Relative speed | 13.326 km/s |
| Angle between velocity vectors | 131° |
| Geographic position | 72.9°S, 157.3°W |
| Height | 1030 km |
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