| Primary satellite | Secondary satellite |
| Name | Cosmos 1842 | PEGASUS R/B |
| Spacetrack catalog number | 17911 | 27371 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 14 22:33 | 2021 Jan 15 01:59 |
| Time of closest approach (UTC) | 2020 Dec 04 01:15:53.246 |
| Minimum distance | 330.812 km |
| Height difference | -0.034 km |
| Relative speed | 10.213 km/s |
| Angle between velocity vectors | 85° |
| Geographic position | 36.2°S, 63.2°W |
| Height | 547 km |
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