| Primary satellite | Secondary satellite |
| Name | Vanguard 1 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 16 | 29979 |
| Radar cross section | medium | medium |
| Epoch of two-line elements (UTC) | 2023 May 28 01:32 | 2023 May 28 03:39 |
| Time of closest approach (UTC) | 2023 Mar 27 04:59:13.099 |
| Minimum distance | 714.811 km |
| Height difference | -33.725 km |
| Relative speed | 8.835 km/s |
| Angle between velocity vectors | 69° |
| Geographic position | 18.5°S, 60.1°E |
| Height | 778 km |
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