Vears	Years	Leap Yrs		Drop Vrs	Days	Mean Vear	Mean Year		Oct	Tri
5	8	0		0	2920	584	365		1	0
152	243	61		12	88756	583.9210526	365.2510288		30	1		Venus Transit Cycle
157	251	61		12	91676	583.9235669	365.2430279		31	1
299	478	123		23	174593	583.9230769	365.2573222		59	2		299/23 = 13
304	486	123		23	177513	583.9243421	365.2530864		60	2		Venus Transit Cycle * 2