| Primary satellite | Secondary satellite |
| Name | M-CUBED/EXP-1 PRIME | ASTROSAT |
| Spacetrack catalog number | 37855 | 40930 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2021 Mar 03 08:38 | 2021 Mar 03 02:30 |
| Time of closest approach (UTC) | 2021 Jan 23 01:26:30.940 |
| Minimum distance | 368.894 km |
| Height difference | 5.772 km |
| Relative speed | 11.173 km/s |
| Angle between velocity vectors | 96° |
| Geographic position | 3.7°N, 86.1°E |
| Height | 635 km |
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