Function spkpos 

pub fn spkpos(
    targ: &str,
    et: f64,
    frame: &str,
    abcorr: &str,
    obs: &str,
) -> ([f64; 3], f64)

Available on non-crate feature lock only.

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