Parahita is a system of astronomy prevalent in Kerala and Tamil Nadu, India.
Nilakantha Somayaji (1444–1544), in his Dr̥kkaraṇa, relates how Parahita was created based on the combined observations of a group of scholars who had gathered for a festival at Tirunāvāy on the banks of the Bhāratappuzha River.
The Sanskrit etymology literally means "for the benefit of the common man", and the intention was to simplify astronomical computations so that everyone could do it.
[2] Also Haridatta simplified the representation of numerals from the cumbersome notation of Aryabhata to the katapayadi system which gained wide currency in later Kerala mathematics.
The methods were retained but some of the constants downgraded by Parameshvara in his DrggaNita (1483), and also by Achyuta Pisharati in his rAsigolasphuTanIti (1600).