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feat: Koch, Regiomontanus, Campanus, Topocentric, Alcabitius, Morinus… - #3

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Sep 23, 2026
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… and Vehlow houses

Every code other than P/W/E/O used to fall back to Placidus, so an application offering these systems silently served Placidus cusps under their names. They follow the standard formulas (as in Swiss Ephemeris' swehouse.c) and are unit-tested against Swiss Ephemeris within 1′. Koch falls back to Porphyry inside the polar circles, where it is undefined.

… and Vehlow houses

Every code other than P/W/E/O used to fall back to Placidus, so an application
offering these systems silently served Placidus cusps under their names. They
follow the standard formulas (as in Swiss Ephemeris' swehouse.c) and are
unit-tested against Swiss Ephemeris within 1′. Koch falls back to Porphyry
inside the polar circles, where it is undefined.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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ffalcinelli merged commit 2576e4e into main Sep 23, 2026
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ffalcinelli deleted the feat/house-systems branch September 23, 2026 06:53
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