| Primary satellite | Secondary satellite |
| Name | Cosmos 1674 | BUCCANEER |
| Spacetrack catalog number | 15944 | 43015 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 14 22:37 | 2021 Jan 14 16:47 |
| Time of closest approach (UTC) | 2020 Nov 28 09:54:58.922 |
| Minimum distance | 2.141 km |
| Height difference | 0.348 km |
| Relative speed | 15.291 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 8.2°S, 158.3°W |
| Height | 506 km |
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