meanObliquityIau2006 function

double meanObliquityIau2006(
  1. double t
)

Mean obliquity of the ecliptic of date ε_A (radians) of the IAU 2006 precession, IERS Conventions (2010) eq. 5.40 – accurate only within about ±1000 years of J2000.

Implementation

double meanObliquityIau2006(double t) =>
    _poly(t, [
      84381.406,
      -46.836769,
      -0.0001831,
      0.0020034,
      -0.000000576,
      -0.0000000434,
    ]) *
    arcsecond;