| Primary satellite | Secondary satellite |
| Name | Cosmos 1400 Rocket | FLOCK 4V 18 |
| Spacetrack catalog number | 13403 | 46597 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Mar 07 21:25 | 2021 Mar 08 04:32 |
| Time of closest approach (UTC) | 2021 Jan 22 20:45:49.980 |
| Minimum distance | 303.091 km |
| Height difference | 3.149 km |
| Relative speed | 11.882 km/s |
| Angle between velocity vectors | 103° |
| Geographic position | 78.4°S, 79.0°E |
| Height | 550 km |
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