| Primary satellite | Secondary satellite |
| Name | SL-19 R/B | FENGYUN 1C DEB |
| Spacetrack catalog number | 37363 | 31057 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Mar 07 18:52 | 2021 Mar 06 22:06 |
| Time of closest approach (UTC) | 2021 Jan 21 02:02:48.684 |
| Minimum distance | 245.107 km |
| Height difference | 12.918 km |
| Relative speed | 14.376 km/s |
| Angle between velocity vectors | 155° |
| Geographic position | 47.0°N, 135.0°W |
| Height | 806 km |
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