| Primary satellite | Secondary satellite |
| Name | Cosmos 1726 Rocket | TIMED |
| Spacetrack catalog number | 16496 | 26998 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Mar 07 19:01 | 2021 Mar 08 04:16 |
| Time of closest approach (UTC) | 2021 Jan 25 16:57:27.031 |
| Minimum distance | 23.591 km |
| Height difference | -1.781 km |
| Relative speed | 1.184 km/s |
| Angle between velocity vectors | 9° |
| Geographic position | 19.4°N, 163.1°W |
| Height | 607 km |
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