| Primary satellite | Secondary satellite |
| Name | BIRKELAND | GRACE-FO 2 |
| Spacetrack catalog number | 55015 | 43477 |
| Radar cross section | medium | medium |
| Epoch of two-line elements (UTC) | 2025 Nov 13 06:07 | 2025 Nov 13 03:03 |
| Time of closest approach (UTC) | 2025 Oct 17 20:00:54.696 |
| Minimum distance | 258.576 km |
| Height difference | 0.288 km |
| Relative speed | 13.353 km/s |
| Angle between velocity vectors | 122° |
| Geographic position | 82.6°S, 107.5°E |
| Height | 483 km |
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