2 Commits

Author	SHA1	Message	Date
Ryan Malloy	4d64b78fb8	Add v0.19.0: sun almanac, conjunction detection, penumbral fraction, physical libration ... Four new functions (184 → 188 SQL objects): - sun_almanac_events(): merged rise/set + twilight SRF (4 threshold scans) - planet_conjunctions(): angular separation minima via daily scan + ternary search - satellite_penumbral_fraction(): continuous 0.0-1.0 shadow depth - moon_physical_libration(): Meeus p. 373 Fourier corrections (tau, rho) 30 regression test suites, all passing.	2026-02-28 13:51:35 -07:00
Ryan Malloy	22b272fd0c	Implement v0.17.0: solar elongation, planet phase, satellite eclipse, observing night quality, lunar libration ... 162 → 174 SQL objects, 27 → 28 test suites, 3 new C source files. Features: - solar_elongation(body_id, ts): Sun-Earth-Planet angle [0,180] degrees - planet_phase(body_id, ts): illuminated disk fraction [0,1] - satellite_is_eclipsed/next_eclipse_entry/exit/eclipse_fraction: cylindrical shadow model (Vallado §5.3) for Earth shadow prediction - observing_night_quality(observer, ts): composite PL/pgSQL scoring based on astronomical darkness duration and Moon interference - moon_libration_longitude/latitude/position_angle/libration/subsolar_longitude: optical libration from Meeus (1998) Ch. 53 Refactored magnitude_funcs.c to extract shared compute_planet_geometry() used by magnitude, elongation, and phase — single VSOP87 evaluation per call. All 28 regression suites pass. Zero compiler warnings.	2026-02-26 18:47:30 -07:00