| Primary satellite | Secondary satellite |
| Name | Cosmos 494 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 6061 | 30227 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 20:26 | 2021 Jan 18 03:28 |
| Time of closest approach (UTC) | 2020 Nov 28 12:10:32.019 |
| Minimum distance | 2.732 km |
| Height difference | -1.793 km |
| Relative speed | 14.906 km/s |
| Angle between velocity vectors | 173° |
| Geographic position | 10.6°N, 124.8°E |
| Height | 772 km |
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