| Primary satellite | Secondary satellite |
| Name | Cosmos 2026 Rocket | Kosmos-890 |
| Spacetrack catalog number | 20046 | 9737 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 15 12:14 | 2021 Jan 15 12:09 |
| Time of closest approach (UTC) | 2020 Dec 04 23:14:16.774 |
| Minimum distance | 13.594 km |
| Height difference | 2.626 km |
| Relative speed | 13.220 km/s |
| Angle between velocity vectors | 129° |
| Geographic position | 73.4°S, 8.2°W |
| Height | 1027 km |
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