| Primary satellite | Secondary satellite |
| Name | Cosmos 494 Rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 6061 | 34962 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 20:26 | 2021 Jan 17 18:06 |
| Time of closest approach (UTC) | 2020 Nov 29 16:02:06.986 |
| Minimum distance | 51.437 km |
| Height difference | -2.312 km |
| Relative speed | 0.862 km/s |
| Angle between velocity vectors | 7° |
| Geographic position | 74.1°S, 32.8°W |
| Height | 782 km |
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