| Primary satellite | Secondary satellite |
| Name | Explorer 11/Cluster Stage 4 | NOAA 16 DEB |
| Spacetrack catalog number | 107 | 41372 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2021 Apr 12 19:52 | 2021 Apr 12 16:42 |
| Time of closest approach (UTC) | 2021 Mar 07 19:51:00.022 |
| Minimum distance | 3.390 km |
| Height difference | -2.878 km |
| Relative speed | 11.382 km/s |
| Angle between velocity vectors | 99° |
| Geographic position | 28.9°S, 62.5°W |
| Height | 784 km |
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