| Primary satellite | Secondary satellite |
| Name | PDD Test Mass | IRIDIUM 33 DEB |
| Spacetrack catalog number | 20564 | 36390 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 18:27 | 2024 Dec 16 13:58 |
| Time of closest approach (UTC) | 2024 Dec 29 19:34:42.819 |
| Minimum distance | 1.635 km |
| Height difference | 0.170 km |
| Relative speed | 15.018 km/s |
| Angle between velocity vectors | 175° |
| Geographic position | 41.0°S, 62.1°E |
| Height | 668 km |
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