| Primary satellite | Secondary satellite |
| Name | USA-17 | CZ-2D R/B |
| Spacetrack catalog number | 16625 | 41858 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Apr 12 10:27 | 2021 Apr 13 09:54 |
| Time of closest approach (UTC) | 2021 Mar 06 07:53:34.059 |
| Minimum distance | 1.414 km |
| Height difference | 0.792 km |
| Relative speed | 14.927 km/s |
| Angle between velocity vectors | 161° |
| Geographic position | 12.5°N, 48.0°W |
| Height | 750 km |
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