| Primary satellite | Secondary satellite |
| Name | Cosmos 1674 | OBJECT X |
| Spacetrack catalog number | 15944 | 43897 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Jan 25 16:07 | 2021 Jan 25 21:07 |
| Time of closest approach (UTC) | 2020 Dec 04 02:19:10.552 |
| Minimum distance | 3.651 km |
| Height difference | 3.394 km |
| Relative speed | 15.216 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 62.2°N, 111.1°E |
| Height | 515 km |
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