| Primary satellite | Secondary satellite |
| Name | NPP | deb Chang Zheng 4 |
| Spacetrack catalog number | 37849 | 20903 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2026 Jan 20 07:40 | 2026 Jan 19 13:23 |
| Time of closest approach (UTC) | 2025 Dec 20 09:26:18.254 |
| Minimum distance | 72.728 km |
| Height difference | 1.431 km |
| Relative speed | 7.974 km/s |
| Angle between velocity vectors | 65° |
| Geographic position | 80.0°N, 0.2°E |
| Height | 839 km |
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