SunCalc

SunCalc is a tiny dependency-free JavaScript library for calculating solar and lunar information for any location and time. It provides sun altitude and azimuth together with sunrise, sunset, twilight, and other sunlight phases. Moon calculations include position, rise and set times, distance, and illuminated phase. Version 2 rebuilt the astronomy around higher-order models from Jean Meeus and validates results against authoritative astronomical references. Typical rise and set errors are around 15 seconds, with substantially improved positional accuracy over the earlier release. It ships as a modern ES module while retaining bundled support for CommonJS and direct browser use.

Features

Sun position calculations
Sunrise, sunset, and twilight times
Moon position and distance
Moonrise, moonset, and lunar phase
High-precision astronomical models
ES module, CommonJS, and browser support

Project Samples

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License

BSD License

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Additional Project Details

Programming Language

JavaScript

Related Categories

JavaScript Libraries

Registered

1 day ago

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