| Primary satellite | Secondary satellite |
| Name | Cosmos 1975 | STARLINK-1523 |
| Spacetrack catalog number | 19573 | 46028 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 23 10:26 | 2021 Jan 23 19:33 |
| Time of closest approach (UTC) | 2020 Dec 04 16:26:14.599 |
| Minimum distance | 4821.787 km |
| Height difference | 0.249 km |
| Relative speed | 11.487 km/s |
| Angle between velocity vectors | 99° |
| Geographic position | 78.7°S, 99.6°E |
| Height | 571 km |
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