| Primary satellite | Secondary satellite |
| Name | Cosmos 2026 Rocket | deb Kosmos-397 |
| Spacetrack catalog number | 20046 | 5414 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 15 12:14 | 2021 Jan 14 21:06 |
| Time of closest approach (UTC) | 2020 Dec 06 05:30:21.396 |
| Minimum distance | 17.424 km |
| Height difference | -7.071 km |
| Relative speed | 4.324 km/s |
| Angle between velocity vectors | 34° |
| Geographic position | 57.8°N, 68.6°W |
| Height | 963 km |
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