| Primary satellite | Secondary satellite |
| Name | Cosmos 1680 Rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 16012 | 34007 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 13 09:56 | 2021 Apr 13 21:19 |
| Time of closest approach (UTC) | 2021 Mar 03 04:41:58.134 |
| Minimum distance | 27.962 km |
| Height difference | -1.182 km |
| Relative speed | 11.954 km/s |
| Angle between velocity vectors | 106° |
| Geographic position | 62.7°N, 28.6°W |
| Height | 771 km |
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