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Moon data library and API server

Project description

Cerridwen provides data on the moon that is suitable for both astronomical and astrological purposes. It comes with a simple command-line utility and a JSON server, but is also designed to serve as a basis for your own application.

The motivation for this package is to have a reliable open-source library and API that provides comprehensive data on various planetary bodies and factors at a certain point in time.


  • Get comprehensive data on the sun and moon at almost any point in time

  • Rely on the high precision of the NASA JPL ephemeris

  • Make use of a powerful numpy-based algorithm for planetary event finding, (e.g. full moon, squares of planets etc.)

  • Work with Julian and ISO dates

  • Use Cerridwen’s JSON API to ensure loose coupling

  • Extend Cerridwen with ease to suit your own needs


Cerridwen’s full documentation can be found at

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