Putumana Somayāji

Putumana Somayāji was an Indian astronomer.

He wrote a work entitled.

Time
Putumana compared the yuga concepts of several other astronomers. He broke them into three groups: Ãryabhaṭa's view, the Bhāskara II / Sūryasiddhānta view, and a third view. However, all agreed that in the current kalpa, we are in the 71st manu, 28th caturyuga, within Kaliyuga.

He also described a method of correcting the revolutions of the planets within a kalpa. and a way to figure out the curent Kali day

He describes the planets revolutions per caturyuga, using the Ãryabhaṭa method: