| Primary satellite | Secondary satellite |
| Name | ESTCUBE 1 | DMC 3-FM1 |
| Spacetrack catalog number | 39161 | 40715 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2021 Feb 28 05:06 | 2021 Feb 27 19:39 |
| Time of closest approach (UTC) | 2021 Jan 20 20:35:00.362 |
| Minimum distance | 1.342 km |
| Height difference | 0.011 km |
| Relative speed | 14.855 km/s |
| Angle between velocity vectors | 161° |
| Geographic position | 32.2°S, 148.8°W |
| Height | 660 km |
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