| Primary satellite | Secondary satellite |
| Name | Cosmos 1680 Rocket | CSL-04 DEB |
| Spacetrack catalog number | 16012 | 26129 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Apr 13 09:56 | 2021 Apr 14 01:33 |
| Time of closest approach (UTC) | 2021 Mar 04 10:45:37.265 |
| Minimum distance | 19.336 km |
| Height difference | -6.075 km |
| Relative speed | 15.000 km/s |
| Angle between velocity vectors | 167° |
| Geographic position | 57.8°N, 129.6°W |
| Height | 770 km |
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