| Primary satellite | Secondary satellite |
| Name | STARS | COSMOS 2251 DEB |
| Spacetrack catalog number | 33498 | 34051 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2023 Jun 02 16:40 | 2023 Jun 02 14:31 |
| Time of closest approach (UTC) | 2023 Apr 04 18:22:02.920 |
| Minimum distance | 1645.687 km |
| Height difference | 3.175 km |
| Relative speed | 13.272 km/s |
| Angle between velocity vectors | 123° |
| Geographic position | 61.3°N, 83.2°E |
| Height | 635 km |
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