| Primary satellite | Secondary satellite |
| Name | UNAMSat | Cosmos 778 Rocket |
| Spacetrack catalog number | 24305 | 8421 |
| Radar cross section | medium | large |
| Epoch of two-line elements (UTC) | 2021 Feb 25 12:21 | 2021 Feb 25 11:04 |
| Time of closest approach (UTC) | 2021 Jan 19 19:10:46.970 |
| Minimum distance | 4.697 km |
| Height difference | -1.561 km |
| Relative speed | 14.502 km/s |
| Angle between velocity vectors | 160° |
| Geographic position | 45.6°S, 47.0°E |
| Height | 986 km |
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