| Primary satellite | Secondary satellite |
| Name | Terra | COSMOS 2251 DEB |
| Spacetrack catalog number | 25994 | 37131 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 22 19:06 | 2021 Jan 22 14:38 |
| Time of closest approach (UTC) | 2020 Dec 05 08:51:06.864 |
| Minimum distance | 30.979 km |
| Height difference | -0.829 km |
| Relative speed | 14.963 km/s |
| Angle between velocity vectors | 171° |
| Geographic position | 28.7°N, 159.7°W |
| Height | 707 km |
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