An array to receive the cartesian position (x,y,z) and the velocity (xdot, ydot, zdot).
The position and velocity are expressed in Astronomical Unit (au) if unit contains UNIT_AU.
The position and velocity are expressed in kilometers if unit contains UNIT_KM.
The velocity, TT-TDB, TCG-TCB or the derivatives of the angles of the librations of the Moon are expressed in days if unit contains UNIT_DAY.
The velocity, TT-TDB, TCG-TCB or the derivatives of the angles of the librations of the Moon are expressed in seconds if unit contains UNIT_SEC.
The angles of the librations of the Moon are expressed in radians if unit contains UNIT_RAD.
For example, to get the position and velocities expressed in kilometers and kilometers/seconds, the unit must be set to UNIT_KM + UNIT_SEC.