| Primary satellite | Secondary satellite |
| Name | SENTINEL 1B | COSMOS 2251 DEB |
| Spacetrack catalog number | 41456 | 37316 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Nov 17 19:20 | 2025 Nov 17 17:45 |
| Time of closest approach (UTC) | 2025 Oct 17 04:41:24.983 |
| Minimum distance | 814.169 km |
| Height difference | -7.258 km |
| Relative speed | 14.876 km/s |
| Angle between velocity vectors | 158° |
| Geographic position | 49.7°S, 110.3°W |
| Height | 594 km |
|