| Primary satellite | Secondary satellite |
| Name | Cosmos 405 Rocket | LEMUR 2 CHANUSIAK |
| Spacetrack catalog number | 5118 | 43697 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 13 04:15 | 2021 Apr 13 02:14 |
| Time of closest approach (UTC) | 2021 Mar 05 02:08:59.567 |
| Minimum distance | 110.602 km |
| Height difference | -1.501 km |
| Relative speed | 13.827 km/s |
| Angle between velocity vectors | 130° |
| Geographic position | 74.5°N, 125.0°W |
| Height | 506 km |
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