| Primary satellite | Secondary satellite |
| Name | Vanguard 1 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 16 | 31321 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2025 Dec 08 17:41 | 2025 Nov 28 23:11 |
| Time of closest approach (UTC) | 2024 Nov 08 03:41:09.052 |
| Minimum distance | 3302.817 km |
| Height difference | -605.425 km |
| Relative speed | 13.842 km/s |
| Angle between velocity vectors | 136° |
| Geographic position | 26.5°S, 36.7°W |
| Height | 1460 km |
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