| Primary satellite | Secondary satellite |
| Name | Vanguard 2 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 12 | 38786 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2021 Jan 21 12:01 | 2021 Jan 21 12:49 |
| Time of closest approach (UTC) | 2020 Dec 07 19:17:44.092 |
| Minimum distance | 61.190 km |
| Height difference | -19.072 km |
| Relative speed | 13.353 km/s |
| Angle between velocity vectors | 129° |
| Geographic position | 14.5°S, 74.5°E |
| Height | 1187 km |
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