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61 lines
1.4 KiB
Markdown
61 lines
1.4 KiB
Markdown
# Quickstart
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## Install
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Add to `pubspec.yaml`:
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```yaml
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dependencies:
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moon_sighting: ^1.0.0
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```
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Run `dart pub get`.
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## Moon Phase
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```dart
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import 'package:moon_sighting/moon_sighting.dart';
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void main() {
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final phase = getMoonPhase();
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print('Phase: ${phase.phaseName}');
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print('Illumination: ${phase.illumination.toStringAsFixed(1)}%');
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}
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```
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Pass a specific date for historical or future phases:
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```dart
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final phase = getMoonPhase(DateTime.utc(2025, 3, 31));
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```
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## Moon Position
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```dart
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final position = getMoonPosition(
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DateTime.utc(2025, 3, 31, 18, 30),
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21.4225, // Makkah latitude
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39.8262, // longitude
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);
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print('Altitude: ${position.altitude.toStringAsFixed(2)}°');
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print('Azimuth: ${position.azimuth.toStringAsFixed(2)}°');
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print('Distance: ${position.distanceKm.toStringAsFixed(0)} km');
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```
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## Crescent Visibility
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```dart
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final vis = getMoonVisibilityEstimate(
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DateTime.utc(2025, 3, 31, 18, 30),
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21.4225, 39.8262,
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);
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print('Zone: ${vis.zone.label}');
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print('Visible (naked): ${vis.isVisibleNakedEye}');
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print('Visible (aided): ${vis.isVisibleWithAid}');
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```
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## Accuracy Note
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This package uses Meeus lite algorithms with approximately 0.3 degree positional accuracy. The companion JavaScript package (`moon-sighting` on npm) uses JPL DE442S ephemeris for sub-arcminute precision. Use the JS package when observatory-grade accuracy is required.
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