| Primary satellite | Secondary satellite |
| Name | Transit 2A Rocket | Cosmos 1408 Rocket |
| Spacetrack catalog number | 47 | 13553 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Mar 07 13:08 | 2021 Mar 08 01:04 |
| Time of closest approach (UTC) | 2021 Jan 27 11:06:54.590 |
| Minimum distance | 7.342 km |
| Height difference | 2.658 km |
| Relative speed | 14.581 km/s |
| Angle between velocity vectors | 147° |
| Geographic position | 20.7°N, 152.9°E |
| Height | 603 km |
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