| Primary satellite | Secondary satellite |
| Name | Courier 1B | deb Agena D |
| Spacetrack catalog number | 58 | 4753 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Feb 25 11:57 | 2021 Feb 25 10:44 |
| Time of closest approach (UTC) | 2021 Jan 31 02:26:04.285 |
| Minimum distance | 11.901 km |
| Height difference | 1.000 km |
| Relative speed | 8.660 km/s |
| Angle between velocity vectors | 72° |
| Geographic position | 0.7°N, 31.4°E |
| Height | 972 km |
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