| Primary satellite | Secondary satellite |
| Name | Cosmos 1400 Rocket | THORAD AGENA D DEB |
| Spacetrack catalog number | 13403 | 42525 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Mar 08 13:21 | 2021 Mar 07 18:22 |
| Time of closest approach (UTC) | 2021 Jan 20 08:36:27.640 |
| Minimum distance | 1.700 km |
| Height difference | 1.398 km |
| Relative speed | 15.220 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 5.5°N, 43.9°W |
| Height | 551 km |
|