Class: Astronoby::TrueObliquity

Inherits:

Object

• Object
• Astronoby::TrueObliquity

Defined in:

lib/astronoby/true_obliquity.rb

Overview

Computes the true obliquity of the ecliptic (mean obliquity + nutation in obliquity).

Class Method Summary

• .at(instant) ⇒ Astronoby::Angle

  The true obliquity.

Class Method Details

.at(instant) ⇒ Astronoby::Angle

Returns the true obliquity.

Parameters:

• instant (Astronoby::Instant) —

  the time instant

Returns:

• (Astronoby::Angle) —

  the true obliquity

# File 'lib/astronoby/true_obliquity.rb', line 9

def self.at(instant)
  mean_obliquity = MeanObliquity.at(instant)
  nutation = Nutation.new(instant: instant).nutation_in_obliquity

  mean_obliquity + nutation
end