Coordinate Index

Positions of planets and other orbiting bodies (including the Sun and Moon) can be calculated in two (2) different coordinate systems:

1. Ecliptic
2. Equatorial

While the ecliptic coordinate system is the primary one used by astrologers for obtaining the location of a point within the zodiac, the equatorial system is sometimes used for the purposes of analyzing declinations.

Ecliptic Longitude

By default, the API will always include the longitude value from the ecliptic coordinate system for all chart points in the request parameters.

The following table lists the options that can be passed into the coordinates request parameter in order to obtain additional details for each selected chart point.

System	Name	Value	Note
Ecliptic	Longitude	longitude	Always Calculated
Ecliptic	Longitude Velocity	longitude_velocity	Optional
Ecliptic	Latitude	latitude	Optional
Ecliptic	Latitude Velocity	latitude_velocity	Optional
Equatorial	Right Ascension	right_ascension	Optional
Equatorial	Right Ascension Velocity	right_ascension_velocity	Optional
Equatorial	Declination	declination	Optional
Equatorial	Declination Velocity	declination_velocity	Optional