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28 lines
1.9 KiB
Markdown
28 lines
1.9 KiB
Markdown
# Changelog
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All notable changes to this project will be documented in this file.
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The format is based on [Keep a Changelog](https://keepachangelog.com/).
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## [1.0.0] - 2026-03-08
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### Added
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- `getMoonPhase()` returns phase name, emoji symbol, illumination percentage, age in hours, elongation, waxing/waning state, and next/previous new moon and full moon dates
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- `getMoonPosition()` returns topocentric azimuth, altitude (with Bennett refraction), geocentric distance, and parallactic angle for any observer location
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- `getMoonIllumination()` returns illumination fraction, phase cycle position, bright limb position angle, and waxing/waning indicator
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- `getMoonVisibilityEstimate()` computes Odeh crescent visibility criterion (V parameter, zones A through D) from approximate Meeus positions at a given observation time
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- `getMoon()` combined snapshot bundling all four functions in a single call
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- `arcvMinimum()` the Odeh 2006 polynomial for minimum arc of vision as a function of crescent width
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- Meeus Ch. 25 Sun position (geocentric, < 0.01 deg accuracy)
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- Meeus Ch. 47 Moon position with 30 longitude terms and 20 latitude terms (< 0.3 deg accuracy)
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- Meeus Ch. 49 new moon and full moon time estimation (within ~2 hours)
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- Full delta-T polynomial (Espenak & Meeus, piecewise by year)
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- Leap-second table through 2017 Jan 1 (37 seconds)
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- WGS84 geodetic to ECEF conversion
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- Bennett (1982) atmospheric refraction with pressure/temperature correction
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- Simplified GCRS to ITRS frame rotation via Earth Rotation Angle (sufficient for lite-mode ~1 deg accuracy)
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- Yallop q-test with categories A through F (NAO Technical Note 69)
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- Odeh V-parameter with zones A through D (Experimental Astronomy 2006)
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- Input validation for latitude, longitude ranges
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- Complete type system: `MoonPhaseResult`, `MoonPosition`, `MoonIlluminationResult`, `MoonVisibilityEstimate`, `MoonSnapshot`, `YallopResult`, `OdehResult`, `CrescentGeometry`
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