| Primary satellite | Secondary satellite |
| Name | Hubble Space Telescope | FENGYUN 1C DEB |
| Spacetrack catalog number | 20580 | 35145 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 16 08:38 | 2021 Apr 15 07:25 |
| Time of closest approach (UTC) | 2021 Mar 09 23:42:57.590 |
| Minimum distance | 29.021 km |
| Height difference | -2.043 km |
| Relative speed | 12.099 km/s |
| Angle between velocity vectors | 106° |
| Geographic position | 28.2°S, 119.3°E |
| Height | 545 km |
|