| Primary satellite | Secondary satellite |
| Name | HJ-1C | FLOCK 2K 11 |
| Spacetrack catalog number | 38997 | 42894 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 22 18:40 | 2021 Jan 22 13:22 |
| Time of closest approach (UTC) | 2020 Dec 05 10:11:48.005 |
| Minimum distance | 230.393 km |
| Height difference | -5.454 km |
| Relative speed | 15.127 km/s |
| Angle between velocity vectors | 162° |
| Geographic position | 33.4°N, 35.6°W |
| Height | 436 km |
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