| Primary satellite | Secondary satellite |
| Name | KKS-1 | ESTCUBE 1 |
| Spacetrack catalog number | 33499 | 39161 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2025 Jun 16 03:24 | 2025 Jun 16 02:33 |
| Time of closest approach (UTC) | 2025 May 13 13:18:20.669 |
| Minimum distance | 2.985 km |
| Height difference | 2.928 km |
| Relative speed | 14.435 km/s |
| Angle between velocity vectors | 147° |
| Geographic position | 61.2°S, 139.1°E |
| Height | 648 km |
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