| Primary satellite | Secondary satellite |
| Name | STARS | COSMOS 2251 DEB |
| Spacetrack catalog number | 33498 | 33901 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2023 Jan 27 17:28 | 2023 Jan 27 14:20 |
| Time of closest approach (UTC) | 2022 Dec 03 11:02:35.014 |
| Minimum distance | 2055.116 km |
| Height difference | 5.484 km |
| Relative speed | 13.937 km/s |
| Angle between velocity vectors | 134° |
| Geographic position | 54.2°N, 17.1°W |
| Height | 629 km |
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