| Primary satellite | Secondary satellite |
| Name | M-CUBED/EXP-1 PRIME | OBJECT-B |
| Spacetrack catalog number | 37855 | 40382 |
| Radar cross section | small | |
| Epoch of two-line elements (UTC) | 2021 Mar 03 08:38 | 2021 Mar 02 18:33 |
| Time of closest approach (UTC) | 2021 Jan 22 02:07:31.483 |
| Minimum distance | 144.232 km |
| Height difference | -1.380 km |
| Relative speed | 14.969 km/s |
| Angle between velocity vectors | 154° |
| Geographic position | 42.0°N, 93.2°W |
| Height | 436 km |
|