Definitions
Definitions of astronomical values returned in response fields
Response fields are defined here.
Definitions of astronomical values returned in response fields
Response fields are defined here.
Parameter | Units | Description |
---|---|---|
apparentCoordinates
degrees
equatorial right ascension (ra
, α) and declination (decl
, δ)
apparentLongitude
degrees
apparent geocentric ecliptic longitude (λ
)
argOfLatitude
degrees
Moon's argument of latitude: the mean distance of the Moon from its ascending node
dateTD
none
Time stamp in dynamical time, i.e. adjusted for deltaT
eclipticCoordinates
degrees
geocentric ecliptic longitude (λ
) and latitude (β
) of the body referenced to the true equinox of date
equatorialHorizontalParallax
degrees
parallax that varies with the rotation of the Earth or with a difference in location on the Earth; typically only significant for the Moon
jde
none
Julian Ephemeris Day, i.e. Julian Day adjusted for deltaT
expressed as fractional day
meanAnomalyMoon
degrees
mean anomaly of the Moon
meanAnomalySun
degrees
mean anomaly of the Sun
meanElongation
degrees
The Moon's instantaneous angular distance east of the Sun
nutationInLongitude
degrees
nutation in ecliptic longitude
nutationInObliquity
degrees
nutation in obliquity of the ecliptic
obliquityOfEcliptic
degrees
obliquity of the ecliptic: the inclination of Earth's equator with respect to the ecliptic
radiusVector
au (sun), km (moon)
distance from body to Earth, measured between centers