| Primary satellite | Secondary satellite |
| Name | deb Explorer IX | deb Delta 139 |
| Spacetrack catalog number | 85 | 13566 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2021 Jan 14 10:02 | 2021 Jan 15 10:27 |
| Time of closest approach (UTC) | 2020 Nov 30 20:21:27.053 |
| Minimum distance | 163.739 km |
| Height difference | -0.567 km |
| Relative speed | 10.281 km/s |
| Angle between velocity vectors | 87° |
| Geographic position | 36.4°S, 122.1°E |
| Height | 778 km |
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