| Primary satellite | Secondary satellite |
| Name | SL-16 R/B | CZ-4C DEB |
| Spacetrack catalog number | 28353 | 43410 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 14 05:40 | 2021 Apr 14 13:24 |
| Time of closest approach (UTC) | 2021 Mar 06 15:12:24.094 |
| Minimum distance | 17.244 km |
| Height difference | 3.334 km |
| Relative speed | 13.990 km/s |
| Angle between velocity vectors | 139° |
| Geographic position | 69.2°N, 141.2°E |
| Height | 860 km |
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