| Primary satellite | Secondary satellite |
| Name | SL-16 R/B | deb Feng Yun 1B |
| Spacetrack catalog number | 28353 | 23258 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 14 05:40 | 2021 Apr 14 12:25 |
| Time of closest approach (UTC) | 2021 Mar 05 14:48:15.829 |
| Minimum distance | 47.164 km |
| Height difference | 0.459 km |
| Relative speed | 5.517 km/s |
| Angle between velocity vectors | 44° |
| Geographic position | 50.1°S, 61.8°E |
| Height | 859 km |
|