The precession (ayana) is not accounted for in the nirayana system (without ayana), which thus dates the actual samkranti correctly but identifies it wrongly with the equinox or solstice, and the sayana system (with ayana), which thus dates the equinox an
The precession (ayana) is not accounted for in the nirayana system (without ayana), which thus dates the actual samkranti correctly but identifies it wrongly with the equinox or solstice, and the sayana system (with ayana), which thus dates the equinox an
运动（阿雅拿）并不包括在尼拉雅拿体系里面（没有阿雅拿），因此实际上是准确地注明太阳的运行，但不正当地与昼夜平分点或至点看作一样；赛雅拿体系（没有阿雅拿）准备地注明了昼夜平分点和至日，但不正当地与太阳看作一样。