The equation of time is the difference of the real Sun time and the mean Sun time. This difference is due to the elliptical shape of the Earth's orbit, and the obliquity of the orbit.
Sun now has a #equation_of_time method that returns an integer: the time difference in seconds.
date = Date.new(2010, 7, 27)
Astronoby::Sun.equation_of_time(date: date)
# => -392
The equation of time is the difference of the real Sun time and the mean Sun time. This difference is due to the elliptical shape of the Earth's orbit, and the obliquity of the orbit.
Sunnow has a#equation_of_timemethod that returns an integer: the time difference in seconds.