| Primary satellite | Secondary satellite |
| Name | UKube-1 | COSMOS 2251 DEB |
| Spacetrack catalog number | 40074 | 47117 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2021 Mar 07 12:48 | 2021 Mar 06 21:05 |
| Time of closest approach (UTC) | 2021 Jan 18 23:59:04.229 |
| Minimum distance | 78.954 km |
| Height difference | 6.736 km |
| Relative speed | 14.618 km/s |
| Angle between velocity vectors | 152° |
| Geographic position | 71.2°S, 133.5°E |
| Height | 644 km |
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