| Primary satellite | Secondary satellite |
| Name | SL-4 R/B | GAOFEN 1 |
| Spacetrack catalog number | 39679 | 39150 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Apr 13 03:11 | 2021 Apr 13 04:30 |
| Time of closest approach (UTC) | 2021 Mar 05 09:30:35.133 |
| Minimum distance | 116.580 km |
| Height difference | -4.183 km |
| Relative speed | 14.339 km/s |
| Angle between velocity vectors | 146° |
| Geographic position | 23.9°S, 9.8°E |
| Height | 664 km |
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