Function moon_position_topocentric 

pub fn moon_position_topocentric(
    at: OffsetDateTime,
    site: &Location,
) -> Equatorial

Topocentric lunar position for an observer (equatorial, epoch of date) — Meeus ch. 40 parallax correction with WGS-84-flattened site coordinates. The shift from moon_position (geocentric) can reach ~61′ (the Moon’s horizontal parallax).

use skymath::{moon_position, moon_position_topocentric, separation, Location};
use time::OffsetDateTime;

let site = Location::parse("+52 05 32", "+004 18 27", 6.0)?;
let now = OffsetDateTime::now_utc();
let parallax_shift = separation(moon_position(now), moon_position_topocentric(now, &site));
assert!(parallax_shift.arcminutes() <= 62.0);