The celestial body whose barycentric state vector is to be calculated.
Supported values are Body.Sun, Body.Moon, Body.EMB, Body.SSB, and all planets:
Body.Mercury, Body.Venus, Body.Earth, Body.Mars, Body.Jupiter,
Body.Saturn, Body.Uranus, Body.Neptune, Body.Pluto.
The date and time for which to calculate position and velocity.
An object that contains barycentric position and velocity vectors.
Calculates barycentric position and velocity vectors for the given body.
Given a body and a time, calculates the barycentric position and velocity vectors for the center of that body at that time. The vectors are expressed in J2000 mean equator coordinates (EQJ).