| Primary satellite | Secondary satellite |
| Name | Cosmos 540 Rocket | Cosmos 1898 Rocket |
| Spacetrack catalog number | 6324 | 18586 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2025 Dec 07 20:21 | 2025 Dec 07 17:26 |
| Time of closest approach (UTC) | 2024 Nov 18 15:05:13.077 |
| Minimum distance | 4237.218 km |
| Height difference | 44.039 km |
| Relative speed | 14.129 km/s |
| Angle between velocity vectors | 143° |
| Geographic position | 72.9°S, 126.9°E |
| Height | 762 km |
|