Moshier-Ephemeris-JS
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Eclipses
How do you calculate the eclipses? For the Lunar, it comes down to finding how close the moon is to either of the nodes.
Ephemeris.moon.orbit .meanAscendingNode.apparentLongitude
Ephemeris.moon.orbit .meanDescendingNode.apparentLongitude
and comparing it to
Ephemeris.moon.position.apparentGeocentric.longitude