| Primary satellite | Secondary satellite |
| Name | PORCUPINE 2 | NNS O-31 |
| Spacetrack catalog number | 1577 | 19420 |
| Radar cross section | medium | large |
| Epoch of two-line elements (UTC) | 2024 Dec 23 03:47 | 2024 Dec 22 15:37 |
| Time of closest approach (UTC) | 2024 Dec 26 08:00:14.826 |
| Minimum distance | 1.913 km |
| Height difference | -1.863 km |
| Relative speed | 14.467 km/s |
| Angle between velocity vectors | 168° |
| Geographic position | 89.9°S, 177.7°E |
| Height | 1152 km |
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