: It uses the Vakyakarana as its primary source book, which derives data from classical Siddhanta texts like the Surya Siddhanta .
: The star/constellation the Moon is currently in (27 in total). raghunatha iyer vakya panchangam verified
Every year, before the Tamil New Year (generally April 14/15), the chief astronomer of the lineage performs a physical graha sthithi (planetary status check). Using traditional instruments like the Shanku Yantra (gnomon) and Gola Yantra (armillary sphere), they cross-check the positions of the five geometric planets (Budha, Shukra, Mangal, Guru, Shani), the Sun, and the Moon against the Vakya predictions. : It uses the Vakyakarana as its primary