3-Screw Tilt-Plate Micrometer Turn Solver from Single Star-Field FITS

Deterministic Half-Flux Diameter (HFD) quadratic focal surface z(x,y) regression + 120° 3-point kinematic mount screw pitch transformation (0.5 mm/rev) engine (.fits, .fit, .xisf, .dng) built for ZWO ASI2600MM, QHYCCD, Gerd Neumann CTU, Celestron RASA — zero-upload ephemeral Wasm RAM execution.

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