Task 430: Extract and Test 3D Coordinate Transform Functions
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Task 430: Extract and Test 3D Coordinate Transform Functions
Status: DONE
Summary
Extract equatorialToEcliptic, saturnRingPlaneNormal, and uranusSpinAxis from orbital-3d-analysis.ts into a separate coordinate-transforms.ts module and add comprehensive tests. These are pure math functions with IAU-verifiable outputs but currently have zero test coverage because the parent module has a bare main() call preventing import.
Rationale
- Pure math functions ideal for TDD — verifiable against IAU J2000 constants
- Currently untested because parent module executes on import
- Coordinate transforms are foundational to 3D orbital analysis accuracy