He discovered that in 7 cycles of 12 years, Jupiter had completed seven and one twelfth orbits, giving its sidereal period as 11.859 years (accurate to within one part in 4000).
Siya natuklasan na sa 7 cycles ng 12 taon, Jupiter had nakumpleto pitong at isa ikalabindalawa orbits, pagbibigay ng bituin sa kanyang panahon bilang 11,859 years (tumpak sa sa loob ng isang bahagi sa 4000).