| Primary satellite | Secondary satellite |
| Name | Cosmos 1400 Rocket | KAIDUN 1 |
| Spacetrack catalog number | 13403 | 41915 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Mar 05 21:37 | 2021 Mar 05 20:33 |
| Time of closest approach (UTC) | 2021 Jan 21 20:51:03.894 |
| Minimum distance | 24.280 km |
| Height difference | 1.938 km |
| Relative speed | 13.135 km/s |
| Angle between velocity vectors | 120° |
| Geographic position | 80.5°S, 61.1°E |
| Height | 549 km |
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