| Primary satellite | Secondary satellite |
| Name | STARS | COSMOS 2251 DEB |
| Spacetrack catalog number | 33498 | 34823 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2023 May 29 04:05 | 2023 May 28 17:44 |
| Time of closest approach (UTC) | 2023 Mar 25 21:17:13.427 |
| Minimum distance | 47.708 km |
| Height difference | 4.853 km |
| Relative speed | 15.120 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 11.2°N, 157.6°W |
| Height | 621 km |
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