Of about 1/4, 2/3 or 3/4, Earth's orbital period is 365 & this fraction of a day
They seemed to 
hate fractions and they loved12, because it can be divided by 2,3,4,6, without... [DOC] [TLE] Solutions to exercises [PAR] To make the estimate, we will consider the star as a small mass in orbit around a 
much larger .... 12yr  365.25days yr1  24h day1  60  60sh1.