dynamical mean sun

dynamical mean sun

A fictitious sun conceived to move eastward along the ecliptic at the average rate of the apparent sun.
References in periodicals archive ?
Another approach uses the dynamical mean Sun or fictitious mean Sun - imaginary bodies that move along the ecliptic and the celestial equator, respectively, at a constant rate - and produces seasons of equal length.
The beginnings of summer, fall, and winter are determined by the dynamical mean Sun.