| Primary satellite | Secondary satellite |
| Name | Transit 2A Rocket | DMC 3-FM1 |
| Spacetrack catalog number | 47 | 40715 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 25 16:47 | 2021 Jan 25 22:56 |
| Time of closest approach (UTC) | 2020 Dec 11 12:35:19.340 |
| Minimum distance | 3.365 km |
| Height difference | -1.797 km |
| Relative speed | 14.862 km/s |
| Angle between velocity vectors | 159° |
| Geographic position | 40.4°S, 26.7°W |
| Height | 661 km |
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