| Primary satellite | Secondary satellite |
| Name | PORCUPINE 2 | USA 281 |
| Spacetrack catalog number | 1577 | 43145 |
| Radar cross section | medium | |
| Epoch of two-line elements (UTC) | 2024 Dec 23 03:47 | 2024 Dec 18 05:49 |
| Time of closest approach (UTC) | 2024 Dec 24 01:33:34.184 |
| Minimum distance | 4.421 km |
| Height difference | 2.707 km |
| Relative speed | 2.129 km/s |
| Angle between velocity vectors | 17° |
| Geographic position | 16.5°N, 85.2°W |
| Height | 1078 km |
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