| Primary satellite | Secondary satellite |
| Name | NUDT-PHONESAT | SPARC-1 |
| Spacetrack catalog number | 40900 | 44226 |
| Radar cross section | small | medium |
| Epoch of two-line elements (UTC) | 2021 Feb 25 12:39 | 2021 Feb 25 10:11 |
| Time of closest approach (UTC) | 2021 Jan 23 10:18:38.905 |
| Minimum distance | 20.099 km |
| Height difference | 4.231 km |
| Relative speed | 12.164 km/s |
| Angle between velocity vectors | 106° |
| Geographic position | 39.6°S, 127.1°E |
| Height | 498 km |
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