calculate the eccentricity of earth 's orbit . this is the ratio a-b / a where a is the semi-major axis length and b is the semi-minor axis length . value is 0 for a circular orbit . concode_field_sep PlaceHolder placeHolder concode_field_sep double calculateJulianCentury concode_elem_sep double sunGeometricMeanAnomaly concode_elem_sep double sunApparentLongitude concode_elem_sep double meanObliquityOfEcliptic concode_elem_sep double sunGeometricMeanLongitude concode_elem_sep double sunTrueLongitude concode_elem_sep double calculateSunDeclination concode_elem_sep double sunEquationOfCenter concode_elem_sep double obliquityCorrected concode_elem_sep double calculateEquationOfTime
double function ( final double arg0 ) { return 0.016708634 - arg0 * ( 0.000042037 + 0.0000001267 * arg0 ) ; }