| Primary satellite | Secondary satellite |
| Name | LilacSat-2 | COSMOS 2561 |
| Spacetrack catalog number | 40908 | 54109 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 22 19:48 | 2024 Dec 22 22:55 |
| Time of closest approach (UTC) | 2024 Dec 23 11:51:01.509 |
| Minimum distance | 1.505 km |
| Height difference | -1.303 km |
| Relative speed | 7.622 km/s |
| Angle between velocity vectors | 60° |
| Geographic position | 81.6°N, 35.7°E |
| Height | 474 km |
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