| Primary satellite | Secondary satellite |
| Name | Landsat 7 | COSMOS 2251 DEB |
| Spacetrack catalog number | 25682 | 34860 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 15 02:40 | 2021 Jan 14 17:40 |
| Time of closest approach (UTC) | 2020 Dec 02 13:53:37.585 |
| Minimum distance | 40.816 km |
| Height difference | -0.144 km |
| Relative speed | 14.964 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 8.7°N, 113.6°E |
| Height | 705 km |
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