| Primary satellite | Secondary satellite |
| Name | Cosmos 1745 Rocket | Cosmos 726 Rocket |
| Spacetrack catalog number | 16728 | 7737 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Mar 07 19:36 | 2021 Mar 07 13:38 |
| Time of closest approach (UTC) | 2021 Jan 29 04:22:07.065 |
| Minimum distance | 10.960 km |
| Height difference | 1.383 km |
| Relative speed | 12.622 km/s |
| Angle between velocity vectors | 117° |
| Geographic position | 76.5°N, 32.2°E |
| Height | 966 km |
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