| Primary satellite | Secondary satellite |
| Name | ZACube-1 | COSMOS 2251 DEB |
| Spacetrack catalog number | 39417 | 34949 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2026 Jan 15 08:41 | 2026 Jan 14 18:05 |
| Time of closest approach (UTC) | 2025 Dec 18 09:16:37.878 |
| Minimum distance | 35.355 km |
| Height difference | -2.509 km |
| Relative speed | 14.568 km/s |
| Angle between velocity vectors | 149° |
| Geographic position | 70.8°S, 105.6°E |
| Height | 623 km |
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