| Primary satellite | Secondary satellite |
| Name | Transit 2A Rocket | COSMOS 1275 DEB |
| Spacetrack catalog number | 47 | 39936 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 20:42 | 2021 Jan 17 19:00 |
| Time of closest approach (UTC) | 2020 Nov 29 06:33:15.222 |
| Minimum distance | 13.662 km |
| Height difference | 3.668 km |
| Relative speed | 14.203 km/s |
| Angle between velocity vectors | 149° |
| Geographic position | 11.8°S, 97.9°W |
| Height | 908 km |
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