| Primary satellite | Secondary satellite |
| Name | Transit 4A | CZ-4B DEB |
| Spacetrack catalog number | 116 | 37574 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2021 Mar 07 13:18 | 2021 Mar 07 02:54 |
| Time of closest approach (UTC) | 2021 Jan 24 12:52:04.965 |
| Minimum distance | 10.994 km |
| Height difference | 0.458 km |
| Relative speed | 13.368 km/s |
| Angle between velocity vectors | 130° |
| Geographic position | 65.7°N, 179.9°W |
| Height | 961 km |
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