| Primary satellite | Secondary satellite |
| Name | Terra | COSMOS 2251 DEB |
| Spacetrack catalog number | 25994 | 40225 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 22 19:06 | 2021 Jan 14 14:06 |
| Time of closest approach (UTC) | 2020 Nov 30 03:25:26.790 |
| Minimum distance | 23.211 km |
| Height difference | 4.463 km |
| Relative speed | 14.961 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 9.3°S, 72.5°W |
| Height | 707 km |
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