| Primary satellite | Secondary satellite |
| Name | Cosmos 494 Rocket | COSMOS 1818 DEB |
| Spacetrack catalog number | 6061 | 36939 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 20:26 | 2021 Jan 06 18:04 |
| Time of closest approach (UTC) | 2020 Dec 01 19:51:15.212 |
| Minimum distance | 16.747 km |
| Height difference | 4.283 km |
| Relative speed | 11.801 km/s |
| Angle between velocity vectors | 105° |
| Geographic position | 54.8°S, 26.6°W |
| Height | 785 km |
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