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This average is just 0.00000026 (2.6×10 −7) of a day—slightly more than 1/50 of a second—shorter than Newcomb's value for the mean tropical year of 365.24219878 days, but differs considerably more from the current average vernal equinox year of 365.242362 days, which means that the new year, intended to fall on the vernal equinox, would ...