Usage

edit
  • |tropical or |polar
  • |convert is optional.
{{Circle of latitude|tropical}} → 23°26′10.0″
{{Circle of latitude|polar|convert}} → 66°33′50.0″ (or 66.5639°)

This template uses a continuously updating formula found at http://www.neoprogrammics.com/obliquity_of_the_ecliptic. Note that this formula calculates the Mean Ecliptic, not the True Ecliptic, because it doesn't correct for Nutation.