| Primary satellite | Secondary satellite |
| Name | Landsat 7 | COSMOS 2251 DEB |
| Spacetrack catalog number | 25682 | 39590 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 15 02:40 | 2021 Jan 13 17:25 |
| Time of closest approach (UTC) | 2020 Dec 01 22:32:38.052 |
| Minimum distance | 56.267 km |
| Height difference | 8.473 km |
| Relative speed | 13.933 km/s |
| Angle between velocity vectors | 137° |
| Geographic position | 73.8°S, 136.2°E |
| Height | 729 km |
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