| Primary satellite | Secondary satellite |
| Name | M-CUBED/EXP-1 PRIME | COSMOS 2251 DEB |
| Spacetrack catalog number | 37855 | 36530 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2021 Mar 05 21:11 | 2021 Mar 04 02:54 |
| Time of closest approach (UTC) | 2021 Jan 19 09:38:35.498 |
| Minimum distance | 17.862 km |
| Height difference | 1.878 km |
| Relative speed | 14.965 km/s |
| Angle between velocity vectors | 175° |
| Geographic position | 33.2°S, 30.3°W |
| Height | 674 km |
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