| Primary satellite | Secondary satellite |
| Name | NPP | deb Agena D |
| Spacetrack catalog number | 37849 | 4912 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2026 Jan 20 07:40 | 2026 Jan 20 05:35 |
| Time of closest approach (UTC) | 2025 Dec 18 03:57:58.610 |
| Minimum distance | 132.039 km |
| Height difference | 0.766 km |
| Relative speed | 14.424 km/s |
| Angle between velocity vectors | 153° |
| Geographic position | 45.5°S, 46.0°W |
| Height | 844 km |
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