| Primary satellite | Secondary satellite |
| Name | Cosmos 1891 Rocket | Nimbus 2 Debris |
| Spacetrack catalog number | 18403 | 25526 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 02:58 | 2024 Dec 22 13:53 |
| Time of closest approach (UTC) | 2024 Dec 23 20:02:37.166 |
| Minimum distance | 3.669 km |
| Height difference | -3.435 km |
| Relative speed | 14.492 km/s |
| Angle between velocity vectors | 164° |
| Geographic position | 74.8°S, 144.6°E |
| Height | 1036 km |
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