| Primary satellite | Secondary satellite |
| Name | Cosmos 494 Rocket | Cosmos 1140 |
| Spacetrack catalog number | 6061 | 11573 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 17 20:26 | 2021 Jan 17 16:03 |
| Time of closest approach (UTC) | 2020 Nov 30 00:44:23.909 |
| Minimum distance | 7.096 km |
| Height difference | 5.576 km |
| Relative speed | 14.327 km/s |
| Angle between velocity vectors | 148° |
| Geographic position | 10.6°S, 74.1°W |
| Height | 774 km |
|