| Primary satellite | Secondary satellite |
| Name | ESTCUBE 1 | COSMOS 2251 DEB |
| Spacetrack catalog number | 39161 | 35711 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2023 May 28 04:45 | 2023 May 27 11:41 |
| Time of closest approach (UTC) | 2023 Mar 30 12:56:47.429 |
| Minimum distance | 51.956 km |
| Height difference | 5.447 km |
| Relative speed | 14.368 km/s |
| Angle between velocity vectors | 145° |
| Geographic position | 71.1°S, 165.9°E |
| Height | 670 km |
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