| Primary satellite | Secondary satellite |
| Name | SJ-12 | Helios 1A Rocket |
| Spacetrack catalog number | 36596 | 23608 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Mar 05 21:17 | 2021 Mar 05 20:49 |
| Time of closest approach (UTC) | 2021 Jan 25 15:08:18.466 |
| Minimum distance | 182.065 km |
| Height difference | -2.660 km |
| Relative speed | 5.260 km/s |
| Angle between velocity vectors | 41° |
| Geographic position | 81.8°S, 135.5°E |
| Height | 597 km |
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