| Primary satellite | Secondary satellite |
| Name | Cosmos 2151 Rocket | CARTOSAT-1 |
| Spacetrack catalog number | 21423 | 28649 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 15 04:12 | 2021 Jan 15 04:46 |
| Time of closest approach (UTC) | 2020 Dec 01 12:00:39.777 |
| Minimum distance | 2.580 km |
| Height difference | -1.181 km |
| Relative speed | 15.101 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 70.1°N, 128.6°E |
| Height | 633 km |
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