| Primary satellite | Secondary satellite |
| Name | FW4S | Vanguard 2 |
| Spacetrack catalog number | 7228 | 11 |
| Radar cross section | medium | medium |
| Epoch of two-line elements (UTC) | 2024 Dec 23 02:28 | 2024 Dec 23 05:19 |
| Time of closest approach (UTC) | 2024 Dec 27 17:45:26.316 |
| Minimum distance | 1.522 km |
| Height difference | 0.693 km |
| Relative speed | 11.223 km/s |
| Angle between velocity vectors | 93° |
| Geographic position | 32.5°S, 127.4°W |
| Height | 708 km |
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