| Primary satellite | Secondary satellite |
| Name | PDD Test Mass | UM5-RIBAT |
| Spacetrack catalog number | 20564 | 60554 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 18:27 | 2024 Dec 22 20:23 |
| Time of closest approach (UTC) | 2024 Dec 25 22:44:31.036 |
| Minimum distance | 0.644 km |
| Height difference | 0.371 km |
| Relative speed | 14.909 km/s |
| Angle between velocity vectors | 159° |
| Geographic position | 68.8°N, 161.1°W |
| Height | 586 km |
|