| Primary satellite | Secondary satellite |
| Name | Cosmos 1680 Rocket | deb Delta 139 |
| Spacetrack catalog number | 16012 | 12288 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 09 17:21 | 2021 Apr 09 17:42 |
| Time of closest approach (UTC) | 2021 Mar 01 05:14:54.530 |
| Minimum distance | 8.539 km |
| Height difference | -3.153 km |
| Relative speed | 14.704 km/s |
| Angle between velocity vectors | 160° |
| Geographic position | 66.3°S, 105.1°W |
| Height | 805 km |
|