| Primary satellite | Secondary satellite |
| Name | NANOACE | COSMOS 2251 DEB |
| Spacetrack catalog number | 42844 | 36378 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2023 Sep 28 12:44 | 2023 Sep 29 04:25 |
| Time of closest approach (UTC) | 2023 May 28 23:57:27.454 |
| Minimum distance | 3501.973 km |
| Height difference | 58.124 km |
| Relative speed | 14.328 km/s |
| Angle between velocity vectors | 144° |
| Geographic position | 35.8°S, 78.6°W |
| Height | 584 km |
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