'(d) the approximate synodic Venus year of 584 days; 583,2(period of synod of Venus) '
I have it as 583.92 x 5 = 2919.6 at Stonehenge and Newgrange in Ireland.
This is 365.25 - 0.3 = 364.95 in comparison to the Solar year used at Stonehenge Winter Solstice to Winter Solstice reset.
Edited 1 time(s). Last edit at 05-Dec-18 14:46 by DavidK.