| Primary satellite | Secondary satellite |
| Name | PDD Test Mass | LEMUR 2 SIERRINI |
| Spacetrack catalog number | 20564 | 60579 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 18:27 | 2024 Dec 22 17:18 |
| Time of closest approach (UTC) | 2024 Dec 26 13:17:25.143 |
| Minimum distance | 4.874 km |
| Height difference | 2.698 km |
| Relative speed | 14.918 km/s |
| Angle between velocity vectors | 159° |
| Geographic position | 68.3°N, 20.0°W |
| Height | 586 km |
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