| Primary satellite | Secondary satellite |
| Name | KKS-1 | STPSAT 2 (USA 217) |
| Spacetrack catalog number | 33499 | 37222 |
| Radar cross section | small | |
| Epoch of two-line elements (UTC) | 2021 Mar 07 21:29 | 2021 Jan 12 17:28 |
| Time of closest approach (UTC) | 2021 Jan 18 08:27:00.830 |
| Minimum distance | 6.569 km |
| Height difference | -1.121 km |
| Relative speed | 4.483 km/s |
| Angle between velocity vectors | 35° |
| Geographic position | 40.1°N, 6.9°W |
| Height | 653 km |
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