Calculates the Moon's libration angles at a given moment in time.
Libration is an observed back-and-forth wobble of the portion of the
Moon visible from the Earth. It is caused by the imperfect tidal locking
of the Moon's fixed rotation rate, compared to its variable angular speed
of orbit around the Earth.
This function calculates a pair of perpendicular libration angles,
one representing rotation of the Moon in ecliptic longitude elon, the other
in ecliptic latitude elat, both relative to the Moon's mean Earth-facing position.
This function also returns the geocentric position of the Moon
expressed in ecliptic longitude mlon, ecliptic latitude mlat, the
distance dist_km between the centers of the Earth and Moon expressed in kilometers,
and the apparent angular diameter of the Moon diam_deg.
Calculates the Moon's libration angles at a given moment in time.
Libration is an observed back-and-forth wobble of the portion of the Moon visible from the Earth. It is caused by the imperfect tidal locking of the Moon's fixed rotation rate, compared to its variable angular speed of orbit around the Earth.
This function calculates a pair of perpendicular libration angles, one representing rotation of the Moon in ecliptic longitude
elon, the other in ecliptic latitudeelat, both relative to the Moon's mean Earth-facing position.This function also returns the geocentric position of the Moon expressed in ecliptic longitude
mlon, ecliptic latitudemlat, the distancedist_kmbetween the centers of the Earth and Moon expressed in kilometers, and the apparent angular diameter of the Moondiam_deg.