spkezr

spkezr is similar to Spkpos, but computes the entire state vector.

spkezr
Abstract
Return the state (position and velocity) of a target body relative to an observing body, optionally corrected for light time (planetary aberration) and stellar aberration.

The state of Moon with respect to the Earth/Moon Barycenter

The state of Moon with respect to the Earth/Moon Barycenter

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Results at 2022 JAN 19 01:49:38.592 UTC:

[(-256387.71, 259021.9, 148136.81); (-0.7185901, -0.62086363, -0.24174899)]

Units are Kilometers; Kilometers/Second.

State Vectors

SStateVector (State Vector) and constituents

SStateVector (State Vector) and constituents

A State Vector includes both a position (r) and velocity term (v). The full state vector is required for many operations, such as computing orbital elements.

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