| Primary satellite | Secondary satellite |
| Name | ESTCUBE 1 | COSMOS 2251 DEB |
| Spacetrack catalog number | 39161 | 33999 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2023 Jun 02 00:24 | 2023 Jun 01 12:59 |
| Time of closest approach (UTC) | 2023 Mar 27 17:10:34.282 |
| Minimum distance | 381.834 km |
| Height difference | -5.297 km |
| Relative speed | 14.832 km/s |
| Angle between velocity vectors | 159° |
| Geographic position | 72.2°N, 53.4°E |
| Height | 668 km |
|