Tools Astrocalculator Ecliptic Coordinates module The Ecliptic Coordinates calculator module Ecliptic Coordinates This module converts between Equatorial coordinates and Ecliptic coordinates. First, select Date and time:. Then, fill in the coordinate values in either the Ecliptic Coordinates or Equatorial Coordinates section. Alternatively set the equatorial coordinates by selecting an object using the Find Object dialog. Then the complementary coordinates will be filled in.