| 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 17 10:39 | 2021 Jan 17 17:36 |
| Time of closest approach (UTC) | 2020 Dec 04 02:19:39.923 |
| Minimum distance | 4.464 km |
| Height difference | 4.452 km |
| Relative speed | 15.216 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 63.7°N, 110.0°E |
| Height | 514 km |
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