| Primary satellite | Secondary satellite |
| Name | Terra | COSMOS 2251 DEB |
| Spacetrack catalog number | 25994 | 34638 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 22 19:06 | 2021 Jan 22 20:07 |
| Time of closest approach (UTC) | 2020 Dec 02 20:05:00.170 |
| Minimum distance | 115.575 km |
| Height difference | -3.080 km |
| Relative speed | 14.408 km/s |
| Angle between velocity vectors | 147° |
| Geographic position | 72.9°N, 8.6°E |
| Height | 716 km |
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