The time at which the vector is valid.
The velocity x-coordinate expressed in AU/day.
The velocity y-coordinate expressed in AU/day.
The velocity z-coordinate expressed in AU/day.
The position x-coordinate expressed in astronomical units (AU).
The position y-coordinate expressed in astronomical units (AU).
The position z-coordinate expressed in astronomical units (AU).
A combination of a position vector, a velocity vector, and a time.
Holds the state vector of a body at a given time, including its position, velocity, and the time they are valid.